18289056 has 48 divisors (see below), whose sum is σ = 48837600. Its totient is φ = 5991168.

The previous prime is 18289027. The next prime is 18289069. The reversal of 18289056 is 65098281.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18289056² = 668979138742272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4050 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (1017450).

Almost surely, 2^18289056 is an apocalyptic number.

18289056 is a gapful number since it is divisible by the number (16) 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 18289056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24418800).

18289056 is an abundant number, since it is smaller than the sum of its proper divisors (30548544).

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

18289056 is a wasteful number, since it uses less digits than its factorization.

18289056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301 (or 3293 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 18289056 is about 4276.5705886843. The cubic root of 18289056 is about 263.4695501350.

The spelling of 18289056 in words is "eighteen million, two hundred eighty-nine thousand, fifty-six".