23664220 has 12 divisors (see below), whose sum is σ = 49694904. Its totient is φ = 9465680.

The previous prime is 23664211. The next prime is 23664247. The reversal of 23664220 is 2246632.

It is a happy number.

It is a congruent number.

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, 591586 + ... + 591625.

It is an arithmetic number, because the mean of its divisors is an integer number (4141242).

Almost surely, 2^23664220 is an apocalyptic number.

23664220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23664220 is an abundant number, since it is smaller than the sum of its proper divisors (26030684).

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

23664220 is a wasteful number, since it uses less digits than its factorization.

23664220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183220 (or 1183218 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 23664220 is about 4864.5883690195. The cubic root of 23664220 is about 287.0983730406.

The spelling of 23664220 in words is "twenty-three million, six hundred sixty-four thousand, two hundred twenty".