23915220 has 48 divisors (see below), whose sum is σ = 76530048. Its totient is φ = 5466240.

The previous prime is 23915219. The next prime is 23915231. The reversal of 23915220 is 2251932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28051 + ... + 28890.

It is an arithmetic number, because the mean of its divisors is an integer number (1594376).

Almost surely, 2^23915220 is an apocalyptic number.

23915220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23915220 is an abundant number, since it is smaller than the sum of its proper divisors (52614828).

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

23915220 is a wasteful number, since it uses less digits than its factorization.

23915220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56960 (or 56958 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 23915220 is about 4890.3190079994. The cubic root of 23915220 is about 288.1098635633.

The spelling of 23915220 in words is "twenty-three million, nine hundred fifteen thousand, two hundred twenty".