23978136 has 64 divisors (see below), whose sum is σ = 73785600. Its totient is φ = 6323328.

The previous prime is 23978111. The next prime is 23978137. The reversal of 23978136 is 63187932.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 23978094 and 23978103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23978137) 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, 3306 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (1152900).

Almost surely, 2^23978136 is an apocalyptic number.

23978136 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23978136 is an abundant number, since it is smaller than the sum of its proper divisors (49807464).

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

23978136 is a wasteful number, since it uses less digits than its factorization.

23978136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11008 (or 11004 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 23978136 is about 4896.7474919583. The cubic root of 23978136 is about 288.3622948251.

The spelling of 23978136 in words is "twenty-three million, nine hundred seventy-eight thousand, one hundred thirty-six".