239816640 has 224 divisors, whose sum is σ = 880164864. Its totient is φ = 54190080.

The previous prime is 239816627. The next prime is 239816659. The reversal of 239816640 is 46618932.

239816640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 853300 + ... + 853580.

Almost surely, 2^239816640 is an apocalyptic number.

239816640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 239816640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (440082432).

239816640 is an abundant number, since it is smaller than the sum of its proper divisors (640348224).

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

239816640 is a wasteful number, since it uses less digits than its factorization.

239816640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 239816640 is about 15486.0143355222. The cubic root of 239816640 is about 621.2881991607.

The spelling of 239816640 in words is "two hundred thirty-nine million, eight hundred sixteen thousand, six hundred forty".