615920 has 20 divisors (see below), whose sum is σ = 1432200. Its totient is φ = 246336.

The previous prime is 615919. The next prime is 615941. The reversal of 615920 is 29516.

615920 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 (20).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 615920.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3770 + ... + 3929.

It is an arithmetic number, because the mean of its divisors is an integer number (71610).

2⁶¹⁵⁹²⁰ is an apocalyptic number.

It is an amenable number.

615920 is an abundant number, since it is smaller than the sum of its proper divisors (816280).

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

615920 is a wasteful number, since it uses less digits than its factorization.

615920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7712 (or 7706 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 615920 is about 784.8057084400. The cubic root of 615920 is about 85.0827337481.

The spelling of 615920 in words is "six hundred fifteen thousand, nine hundred twenty".