23620640 has 24 divisors (see below), whose sum is σ = 55804140. Its totient is φ = 9448192.

The previous prime is 23620589. The next prime is 23620673. The reversal of 23620640 is 4602632.

It can be written as a sum of positive squares in 2 ways, for example, as 21418384 + 2202256 = 4628^2 + 1484^2 .

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, 73655 + ... + 73974.

Almost surely, 2^23620640 is an apocalyptic number.

23620640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23620640 is an abundant number, since it is smaller than the sum of its proper divisors (32183500).

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

23620640 is a wasteful number, since it uses less digits than its factorization.

23620640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147644 (or 147636 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 23620640 is about 4860.1069947070. The cubic root of 23620640 is about 286.9220247321.

The spelling of 23620640 in words is "twenty-three million, six hundred twenty thousand, six hundred forty".