23931240 has 64 divisors (see below), whose sum is σ = 76023360. Its totient is φ = 6005760.

The previous prime is 23931239. The next prime is 23931269. The reversal of 23931240 is 4213932.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23931240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3826 + ... + 7905.

It is an arithmetic number, because the mean of its divisors is an integer number (1187865).

Almost surely, 2^23931240 is an apocalyptic number.

23931240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23931240 is an abundant number, since it is smaller than the sum of its proper divisors (52092120).

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

23931240 is a wasteful number, since it uses less digits than its factorization.

23931240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11762 (or 11758 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 23931240 is about 4891.9566637492. The cubic root of 23931240 is about 288.1741809005.

The spelling of 23931240 in words is "twenty-three million, nine hundred thirty-one thousand, two hundred forty".