23440660 has 24 divisors (see below), whose sum is σ = 49419720. Its totient is φ = 9339264.

The previous prime is 23440649. The next prime is 23440663. The reversal of 23440660 is 6604432.

It can be written as a sum of positive squares in 4 ways, for example, as 4186116 + 19254544 = 2046^2 + 4388^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23440663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3202 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (2059155).

Almost surely, 2^23440660 is an apocalyptic number.

23440660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23440660 is an abundant number, since it is smaller than the sum of its proper divisors (25979060).

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

23440660 is a wasteful number, since it uses less digits than its factorization.

23440660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4635 (or 4633 counting only the distinct ones).

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

The square root of 23440660 is about 4841.5555351560. Note that the first 4 decimals coincide. The cubic root of 23440660 is about 286.1914215608.

The spelling of 23440660 in words is "twenty-three million, four hundred forty thousand, six hundred sixty".