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23000000 = 265623
BaseRepresentation
bin101011110111…
…1001111000000
31121021112001212
41113233033000
521342000000
62140545252
7366332252
oct127571700
947245055
1023000000
1111a8a271
127852228
1349c3a8a
1430a9cd2
152044c35
hex15ef3c0

23000000 has 98 divisors (see below), whose sum is σ = 59530488. Its totient is φ = 8800000.

The previous prime is 22999993. The next prime is 23000009. The reversal of 23000000 is 32.

Adding to 23000000 its reverse (32), we get a palindrome (23000032).

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23000009) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 999989 + ... + 1000011.

Almost surely, 223000000 is an apocalyptic number.

23000000 is a gapful number since it is divisible by the number (20) 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 23000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29765244).

23000000 is an abundant number, since it is smaller than the sum of its proper divisors (36530488).

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

23000000 is an frugal number, since it uses more digits than its factorization.

23000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 5.

The square root of 23000000 is about 4795.8315233127. The cubic root of 23000000 is about 284.3866979852.

The spelling of 23000000 in words is "twenty-three million", and thus it is an aban number and an uban number.

Divisors: 1 2 4 5 8 10 16 20 23 25 32 40 46 50 64 80 92 100 115 125 160 184 200 230 250 320 368 400 460 500 575 625 736 800 920 1000 1150 1250 1472 1600 1840 2000 2300 2500 2875 3125 3680 4000 4600 5000 5750 6250 7360 8000 9200 10000 11500 12500 14375 15625 18400 20000 23000 25000 28750 31250 36800 40000 46000 50000 57500 62500 71875 92000 100000 115000 125000 143750 184000 200000 230000 250000 287500 359375 460000 500000 575000 718750 920000 1000000 1150000 1437500 2300000 2875000 4600000 5750000 11500000 23000000