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18092028 = 22319731087
BaseRepresentation
bin100010100000…
…0111111111100
31021001011121010
41011000333330
514112421103
61443435220
7306531303
oct105007774
937034533
1018092028
11a237899
126085b10
133995b56
14258d43a
1518c5903
hex1140ffc

18092028 has 48 divisors (see below), whose sum is σ = 45086720. Its totient is φ = 5629824.

The previous prime is 18092023. The next prime is 18092057. The reversal of 18092028 is 82029081.

It is a junction number, because it is equal to n+sod(n) for n = 18091986 and 18092004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18092023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16101 + ... + 17187.

Almost surely, 218092028 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 18092028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22543360).

18092028 is an abundant number, since it is smaller than the sum of its proper divisors (26994692).

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

18092028 is a wasteful number, since it uses less digits than its factorization.

18092028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 18092028 is about 4253.4724637642. The cubic root of 18092028 is about 262.5200129866.

The spelling of 18092028 in words is "eighteen million, ninety-two thousand, twenty-eight".

Divisors: 1 2 3 4 6 12 19 38 57 73 76 114 146 219 228 292 438 876 1087 1387 2174 2774 3261 4161 4348 5548 6522 8322 13044 16644 20653 41306 61959 79351 82612 123918 158702 238053 247836 317404 476106 952212 1507669 3015338 4523007 6030676 9046014 18092028