23423840 has 48 divisors (see below), whose sum is σ = 60374160. Its totient is φ = 8517120.

The previous prime is 23423837. The next prime is 23423861. The reversal of 23423840 is 4832432.

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, 4895 + ... + 8414.

It is an arithmetic number, because the mean of its divisors is an integer number (1257795).

Almost surely, 2^23423840 is an apocalyptic number.

23423840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23423840 is an abundant number, since it is smaller than the sum of its proper divisors (36950320).

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

23423840 is a wasteful number, since it uses less digits than its factorization.

23423840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13335 (or 13327 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 23423840 is about 4839.8181784030. The cubic root of 23423840 is about 286.1229523347.

It can be divided in two parts, 23 and 423840, that multiplied together give a triangular number (9748320 = T₄₄₁₅).

The spelling of 23423840 in words is "twenty-three million, four hundred twenty-three thousand, eight hundred forty".