915864 has 32 divisors (see below), whose sum is σ = 2365440. Its totient is φ = 295200.

The previous prime is 915851. The next prime is 915869. The reversal of 915864 is 468519.

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 915864.

It is not an unprimeable number, because it can be changed into a prime (915869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129 + ... + 1359.

It is an arithmetic number, because the mean of its divisors is an integer number (73920).

2⁹¹⁵⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 915864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1182720).

915864 is an abundant number, since it is smaller than the sum of its proper divisors (1449576).

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

915864 is a wasteful number, since it uses less digits than its factorization.

915864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1267 counting only the distinct ones).

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

The square root of 915864 is about 957.0078369585. The cubic root of 915864 is about 97.1129162959.

The spelling of 915864 in words is "nine hundred fifteen thousand, eight hundred sixty-four".