615916 has 12 divisors (see below), whose sum is σ = 1231888. Its totient is φ = 263952.

The previous prime is 615907. The next prime is 615919. The reversal of 615916 is 619516.

615916 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 21997 = 615916 / (6 + 1 + 5 + 9 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (615919) by changing a digit.

615916 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10971 + ... + 11026.

2⁶¹⁵⁹¹⁶ is an apocalyptic number.

It is an amenable number.

615916 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

615916 is a wasteful number, since it uses less digits than its factorization.

615916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22008 (or 22006 counting only the distinct ones).

The product of its digits is 1620, while the sum is 28.

The square root of 615916 is about 784.8031600344. The cubic root of 615916 is about 85.0825495621.

Subtracting 615916 from its reverse (619516), we obtain a square (3600 = 60²).

The spelling of 615916 in words is "six hundred fifteen thousand, nine hundred sixteen".