18397152 has 96 divisors (see below), whose sum is σ = 54432000. Its totient is φ = 6044544.

The previous prime is 18397133. The next prime is 18397157. The reversal of 18397152 is 25179381.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×18397152² = 676910403422208, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18397157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92349 + ... + 92547.

It is an arithmetic number, because the mean of its divisors is an integer number (567000).

Almost surely, 2^18397152 is an apocalyptic number.

18397152 is a gapful number since it is divisible by the number (12) 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 18397152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27216000).

18397152 is an abundant number, since it is smaller than the sum of its proper divisors (36034848).

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

18397152 is a wasteful number, since it uses less digits than its factorization.

18397152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325 (or 311 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 18397152 is about 4289.1901333469. The cubic root of 18397152 is about 263.9876027236.

The spelling of 18397152 in words is "eighteen million, three hundred ninety-seven thousand, one hundred fifty-two".