18889056 has 36 divisors (see below), whose sum is σ = 53716572. Its totient is φ = 6296256.

The previous prime is 18889051. The next prime is 18889081. The reversal of 18889056 is 65098881.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×18889056² = 713592873142272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18889051) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 32506 + ... + 33081.

It is an arithmetic number, because the mean of its divisors is an integer number (1492127).

Almost surely, 2^18889056 is an apocalyptic number.

18889056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18889056 is an abundant number, since it is smaller than the sum of its proper divisors (34827516).

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

18889056 is a wasteful number, since it uses less digits than its factorization.

18889056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65603 (or 65592 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 18889056 is about 4346.1541620150. The cubic root of 18889056 is about 266.3197767261.

It can be divided in two parts, 18 and 889056, that multiplied together give a cube (16003008 = 252³).

The spelling of 18889056 in words is "eighteen million, eight hundred eighty-nine thousand, fifty-six".