23963640 has 32 divisors (see below), whose sum is σ = 71891280. Its totient is φ = 6390272.

The previous prime is 23963633. The next prime is 23963669. The reversal of 23963640 is 4636932.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99729 + ... + 99968.

Almost surely, 2^23963640 is an apocalyptic number.

23963640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23963640 is an abundant number, since it is smaller than the sum of its proper divisors (47927640).

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

23963640 is a wasteful number, since it uses less digits than its factorization.

23963640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199711 (or 199707 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 23963640 is about 4895.2671020078. The cubic root of 23963640 is about 288.3041732310.

The spelling of 23963640 in words is "twenty-three million, nine hundred sixty-three thousand, six hundred forty".