615968 has 12 divisors (see below), whose sum is σ = 1212750. Its totient is φ = 307968.

The previous prime is 615949. The next prime is 615971. The reversal of 615968 is 869516.

It can be written as a sum of positive squares in only one way, i.e., 446224 + 169744 = 668^2 + 412^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9593 + ... + 9656.

2⁶¹⁵⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

615968 is a deficient number, since it is larger than the sum of its proper divisors (596782).

615968 is a wasteful number, since it uses less digits than its factorization.

615968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19259 (or 19251 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 615968 is about 784.8362886615. The cubic root of 615968 is about 85.0849439189.

The spelling of 615968 in words is "six hundred fifteen thousand, nine hundred sixty-eight".