815994 has 48 divisors (see below), whose sum is σ = 1939392. Its totient is φ = 256608.

The previous prime is 815989. The next prime is 816019. The reversal of 815994 is 499518.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

815994 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11142 + ... + 11214.

It is an arithmetic number, because the mean of its divisors is an integer number (40404).

2⁸¹⁵⁹⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 815994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969696).

815994 is an abundant number, since it is smaller than the sum of its proper divisors (1123398).

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

815994 is a wasteful number, since it uses less digits than its factorization.

815994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 101 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 815994 is about 903.3238621890. The cubic root of 815994 is about 93.4463455308.

The spelling of 815994 in words is "eight hundred fifteen thousand, nine hundred ninety-four".