815964 has 24 divisors (see below), whose sum is σ = 1926288. Its totient is φ = 268800.

The previous prime is 815963. The next prime is 815977. The reversal of 815964 is 469518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815963) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 814 + ... + 1514.

It is an arithmetic number, because the mean of its divisors is an integer number (80262).

2⁸¹⁵⁹⁶⁴ is an apocalyptic number.

It is an amenable number.

815964 is an abundant number, since it is smaller than the sum of its proper divisors (1110324).

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

815964 is a wasteful number, since it uses less digits than its factorization.

815964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 803 counting only the distinct ones).

The product of its digits is 8640, while the sum is 33.

The square root of 815964 is about 903.3072566962. The cubic root of 815964 is about 93.4452003326.

The spelling of 815964 in words is "eight hundred fifteen thousand, nine hundred sixty-four".