23399856 has 30 divisors (see below), whose sum is σ = 65487500. Its totient is φ = 7799904.

The previous prime is 23399851. The next prime is 23399867. The reversal of 23399856 is 65899332.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (23399851) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 81106 + ... + 81393.

Almost surely, 2^23399856 is an apocalyptic number.

It is an amenable number.

23399856 is an abundant number, since it is smaller than the sum of its proper divisors (42087644).

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

23399856 is a wasteful number, since it uses less digits than its factorization.

23399856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162513 (or 162504 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 23399856 is about 4837.3397647881. The cubic root of 23399856 is about 286.0252638774.

The spelling of 23399856 in words is "twenty-three million, three hundred ninety-nine thousand, eight hundred fifty-six".