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18088252 = 22721331229
BaseRepresentation
bin100010100000…
…0000100111100
31021000222102021
41011000010330
514112311002
61443405524
7306514300
oct105000474
937028367
1018088252
11a234a76
1260838a4
133994210
14258bd00
1518c4737
hex114013c

18088252 has 72 divisors (see below), whose sum is σ = 41112960. Its totient is φ = 6894720.

The previous prime is 18088219. The next prime is 18088253. The reversal of 18088252 is 25288081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18088253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78874 + ... + 79102.

Almost surely, 218088252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18088252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20556480).

18088252 is an abundant number, since it is smaller than the sum of its proper divisors (23024708).

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

18088252 is a wasteful number, since it uses less digits than its factorization.

18088252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 34.

The square root of 18088252 is about 4253.0285679737. The cubic root of 18088252 is about 262.5017481365.

The spelling of 18088252 in words is "eighteen million, eighty-eight thousand, two hundred fifty-two".

Divisors: 1 2 4 7 13 14 26 28 31 49 52 62 91 98 124 182 196 217 229 364 403 434 458 637 806 868 916 1274 1519 1603 1612 2548 2821 2977 3038 3206 5642 5954 6076 6412 7099 11221 11284 11908 14198 19747 20839 22442 28396 39494 41678 44884 49693 78988 83356 92287 99386 145873 184574 198772 291746 347851 369148 583492 646009 695702 1292018 1391404 2584036 4522063 9044126 18088252