815676842 has 8 divisors (see below), whose sum is σ = 1223686656. Its totient is φ = 407781292.

The previous prime is 815676781. The next prime is 815676857. The reversal of 815676842 is 248676518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7658 + ... + 41109.

It is an arithmetic number, because the mean of its divisors is an integer number (152960832).

Almost surely, 2^815676842 is an apocalyptic number.

815676842 is a deficient number, since it is larger than the sum of its proper divisors (408009814).

815676842 is a wasteful number, since it uses less digits than its factorization.

815676842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57132.

The product of its digits is 645120, while the sum is 47.

The square root of 815676842 is about 28560.0567576467. The cubic root of 815676842 is about 934.3423715067.

The spelling of 815676842 in words is "eight hundred fifteen million, six hundred seventy-six thousand, eight hundred forty-two".