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189870000 = 243546329
BaseRepresentation
bin10110101000100…
…10111110110000
3111020021101200020
423110102332300
5342101320000
630501323440
74463603565
oct1324227660
9436241606
10189870000
11981a4161
1253706580
133044b518
141b30686c
1511a07ba0
hexb512fb0

189870000 has 100 divisors (see below), whose sum is σ = 613022520. Its totient is φ = 50624000.

The previous prime is 189869993. The next prime is 189870011. The reversal of 189870000 is 78981.

189870000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (100).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26836 + ... + 33164.

Almost surely, 2189870000 is an apocalyptic number.

189870000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189870000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306511260).

189870000 is an abundant number, since it is smaller than the sum of its proper divisors (423152520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189870000 is an equidigital number, since it uses as much as digits as its factorization.

189870000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6339 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 189870000 is about 13779.3323495734. The cubic root of 189870000 is about 574.7585627831.

The spelling of 189870000 in words is "one hundred eighty-nine million, eight hundred seventy thousand".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 25 30 40 48 50 60 75 80 100 120 125 150 200 240 250 300 375 400 500 600 625 750 1000 1200 1250 1500 1875 2000 2500 3000 3750 5000 6000 6329 7500 10000 12658 15000 18987 25316 30000 31645 37974 50632 63290 75948 94935 101264 126580 151896 158225 189870 253160 303792 316450 379740 474675 506320 632900 759480 791125 949350 1265800 1518960 1582250 1898700 2373375 2531600 3164500 3797400 3955625 4746750 6329000 7594800 7911250 9493500 11866875 12658000 15822500 18987000 23733750 31645000 37974000 47467500 63290000 94935000 189870000