815982086 has 16 divisors (see below), whose sum is σ = 1278064224. Its totient is φ = 389985024.

The previous prime is 815982059. The next prime is 815982091. The reversal of 815982086 is 680289518.

It is a super-2 number, since 2×815982086² = 1331653529345822792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 815982086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72836 + ... + 83288.

It is an arithmetic number, because the mean of its divisors is an integer number (79879014).

Almost surely, 2^815982086 is an apocalyptic number.

815982086 is a deficient number, since it is larger than the sum of its proper divisors (462082138).

815982086 is a wasteful number, since it uses less digits than its factorization.

815982086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175.

The product of its (nonzero) digits is 276480, while the sum is 47.

The square root of 815982086 is about 28565.4001547326. The cubic root of 815982086 is about 934.4589073778.

The spelling of 815982086 in words is "eight hundred fifteen million, nine hundred eighty-two thousand, eighty-six".