23831240 has 32 divisors (see below), whose sum is σ = 53871480. Its totient is φ = 9487872.

The previous prime is 23831239. The next prime is 23831257. The reversal of 23831240 is 4213832.

It can be written as a sum of positive squares in 4 ways, for example, as 14915044 + 8916196 = 3862^2 + 2986^2 .

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, 8042 + ... + 10598.

Almost surely, 2^23831240 is an apocalyptic number.

23831240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23831240 is an abundant number, since it is smaller than the sum of its proper divisors (30040240).

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

23831240 is a wasteful number, since it uses less digits than its factorization.

23831240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2797 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 23831240 is about 4881.7251049194. The cubic root of 23831240 is about 287.7722286027.

The spelling of 23831240 in words is "twenty-three million, eight hundred thirty-one thousand, two hundred forty".