23156404 has 12 divisors (see below), whose sum is σ = 40584544. Its totient is φ = 11560824.

The previous prime is 23156347. The next prime is 23156417. The reversal of 23156404 is 40465132.

It is a super-2 number, since 2×23156404² = 1072438092422432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074 + ... + 6889.

Almost surely, 2^23156404 is an apocalyptic number.

It is an amenable number.

23156404 is a deficient number, since it is larger than the sum of its proper divisors (17428140).

23156404 is a wasteful number, since it uses less digits than its factorization.

23156404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8694 (or 8692 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 23156404 is about 4812.1101400529. The cubic root of 23156404 is about 285.0298686250.

The spelling of 23156404 in words is "twenty-three million, one hundred fifty-six thousand, four hundred four".