23578920 has 48 divisors (see below), whose sum is σ = 76632660. Its totient is φ = 6287616.

The previous prime is 23578903. The next prime is 23578939. The reversal of 23578920 is 2987532.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23444964 + 133956 = 4842^2 + 366^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32389 + ... + 33108.

Almost surely, 2^23578920 is an apocalyptic number.

23578920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23578920 is an abundant number, since it is smaller than the sum of its proper divisors (53053740).

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

23578920 is a wasteful number, since it uses less digits than its factorization.

23578920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65514 (or 65507 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 23578920 is about 4855.8130112269. The cubic root of 23578920 is about 286.7529996567.

The spelling of 23578920 in words is "twenty-three million, five hundred seventy-eight thousand, nine hundred twenty".