815870494 has 16 divisors (see below), whose sum is σ = 1296733536. Its totient is φ = 383660800.

The previous prime is 815870491. The next prime is 815870533. The reversal of 815870494 is 494078518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815870491) 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, 43434 + ... + 59314.

It is an arithmetic number, because the mean of its divisors is an integer number (81045846).

Almost surely, 2^815870494 is an apocalyptic number.

815870494 is a deficient number, since it is larger than the sum of its proper divisors (480863042).

815870494 is a wasteful number, since it uses less digits than its factorization.

815870494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17411.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 815870494 is about 28563.4468158169. The cubic root of 815870494 is about 934.4163072218.

The spelling of 815870494 in words is "eight hundred fifteen million, eight hundred seventy thousand, four hundred ninety-four".