23156388 has 48 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 7661664.

The previous prime is 23156347. The next prime is 23156417. The reversal of 23156388 is 88365132.

23156388 is a `hidden beast` number, since 2 + 3 + 15 + 638 + 8 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15373 + ... + 16811.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^23156388 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 23156388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30240000).

23156388 is an abundant number, since it is smaller than the sum of its proper divisors (37323612).

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

23156388 is a wasteful number, since it uses less digits than its factorization.

23156388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601 (or 1593 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 23156388 is about 4812.1084775803. The cubic root of 23156388 is about 285.0298029775.

The spelling of 23156388 in words is "twenty-three million, one hundred fifty-six thousand, three hundred eighty-eight".