23691136 has 64 divisors (see below), whose sum is σ = 54614880. Its totient is φ = 10027008.

The previous prime is 23691113. The next prime is 23691163. The reversal of 23691136 is 63119632.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×23691136² = 1122539849940992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23691098 and 23691107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122656 + ... + 122848.

Almost surely, 2^23691136 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 23691136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27307440).

23691136 is an abundant number, since it is smaller than the sum of its proper divisors (30923744).

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

23691136 is a wasteful number, since it uses less digits than its factorization.

23691136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 339 counting only the distinct ones).

The product of its digits is 5832, while the sum is 31.

The square root of 23691136 is about 4867.3541066990. The cubic root of 23691136 is about 287.2071816393.

The spelling of 23691136 in words is "twenty-three million, six hundred ninety-one thousand, one hundred thirty-six".