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389880 = 23335192
BaseRepresentation
bin1011111001011111000
3201210211000
41133023320
544434010
612205000
73212451
oct1371370
9653730
10389880
11246a17
12169760
131085ca
14a2128
157a7c0
hex5f2f8

389880 has 96 divisors (see below), whose sum is σ = 1371600. Its totient is φ = 98496.

The previous prime is 389867. The next prime is 389891. The reversal of 389880 is 88983.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20511 + ... + 20529.

2389880 is an apocalyptic number.

389880 is a gapful number since it is divisible by the number (30) 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 389880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (685800).

389880 is an abundant number, since it is smaller than the sum of its proper divisors (981720).

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

389880 is a wasteful number, since it uses less digits than its factorization.

389880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 29 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 389880 is about 624.4037155559. The cubic root of 389880 is about 73.0539414913.

The spelling of 389880 in words is "three hundred eighty-nine thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 18 19 20 24 27 30 36 38 40 45 54 57 60 72 76 90 95 108 114 120 135 152 171 180 190 216 228 270 285 342 360 361 380 456 513 540 570 684 722 760 855 1026 1080 1083 1140 1368 1444 1710 1805 2052 2166 2280 2565 2888 3249 3420 3610 4104 4332 5130 5415 6498 6840 7220 8664 9747 10260 10830 12996 14440 16245 19494 20520 21660 25992 32490 38988 43320 48735 64980 77976 97470 129960 194940 389880