23664816 has 120 divisors (see below), whose sum is σ = 80200224. Its totient is φ = 6359040.

The previous prime is 23664787. The next prime is 23664821. The reversal of 23664816 is 61846632.

23664816 is a `hidden beast` number, since 2 + 3 + 6 + 648 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16446 + ... + 17826.

Almost surely, 2^23664816 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 23664816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40100112).

23664816 is an abundant number, since it is smaller than the sum of its proper divisors (56535408).

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

23664816 is a wasteful number, since it uses less digits than its factorization.

23664816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1419 (or 1410 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 23664816 is about 4864.6496276710. The cubic root of 23664816 is about 287.1007832784.

The spelling of 23664816 in words is "twenty-three million, six hundred sixty-four thousand, eight hundred sixteen".