239965640 has 32 divisors (see below), whose sum is σ = 543170880. Its totient is φ = 95408832.

The previous prime is 239965639. The next prime is 239965657. The reversal of 239965640 is 46569932.

239965640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 239965591 and 239965600.

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, 11282 + ... + 24641.

It is an arithmetic number, because the mean of its divisors is an integer number (16974090).

Almost surely, 2^239965640 is an apocalyptic number.

239965640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

239965640 is an abundant number, since it is smaller than the sum of its proper divisors (303205240).

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

239965640 is a wasteful number, since it uses less digits than its factorization.

239965640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36101 (or 36097 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 239965640 is about 15490.8243809037. The cubic root of 239965640 is about 621.4168429673.

The spelling of 239965640 in words is "two hundred thirty-nine million, nine hundred sixty-five thousand, six hundred forty".