239390640 has 100 divisors (see below), whose sum is σ = 831461664. Its totient is φ = 63835776.

The previous prime is 239390597. The next prime is 239390663. The reversal of 239390640 is 46093932.

It is a happy number.

239390640 is a `hidden beast` number, since 2 + 3 + 9 + 3 + 9 + 0 + 640 = 666.

239390640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 239390595 and 239390604.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11992 + ... + 24951.

Almost surely, 2^239390640 is an apocalyptic number.

239390640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239390640 is an abundant number, since it is smaller than the sum of its proper divisors (592071024).

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

239390640 is a wasteful number, since it uses less digits than its factorization.

239390640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36968 (or 36953 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 239390640 is about 15472.2538758902. The cubic root of 239390640 is about 620.9201045432.

The spelling of 239390640 in words is "two hundred thirty-nine million, three hundred ninety thousand, six hundred forty".