23278864 has 20 divisors (see below), whose sum is σ = 51546304. Its totient is φ = 9976608.

The previous prime is 23278859. The next prime is 23278873. The reversal of 23278864 is 46887232.

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, 103812 + ... + 104035.

Almost surely, 2^23278864 is an apocalyptic number.

It is an amenable number.

23278864 is an abundant number, since it is smaller than the sum of its proper divisors (28267440).

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

23278864 is a wasteful number, since it uses less digits than its factorization.

23278864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207862 (or 207856 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 23278864 is about 4824.8175095023. The cubic root of 23278864 is about 285.5314348139.

It can be divided in two parts, 23278 and 864, that added together give a palindrome (24142).

The spelling of 23278864 in words is "twenty-three million, two hundred seventy-eight thousand, eight hundred sixty-four".