239678540 has 24 divisors (see below), whose sum is σ = 529816560. Its totient is φ = 90825408.

The previous prime is 239678531. The next prime is 239678573. The reversal of 239678540 is 45876932.

It is a junction number, because it is equal to n+sod(n) for n = 239678491 and 239678500.

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, 314987 + ... + 315746.

It is an arithmetic number, because the mean of its divisors is an integer number (22075690).

Almost surely, 2^239678540 is an apocalyptic number.

239678540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239678540 is an abundant number, since it is smaller than the sum of its proper divisors (290138020).

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

239678540 is a wasteful number, since it uses less digits than its factorization.

239678540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630761 (or 630759 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 239678540 is about 15481.5548314761. The cubic root of 239678540 is about 621.1689186206.

The spelling of 239678540 in words is "two hundred thirty-nine million, six hundred seventy-eight thousand, five hundred forty".