813240004 has 6 divisors (see below), whose sum is σ = 1423170014. Its totient is φ = 406620000.

The previous prime is 813239971. The next prime is 813240017. The reversal of 813240004 is 400042318.

It can be written as a sum of positive squares in only one way, i.e., 812820100 + 419904 = 28510^2 + 648^2 .

It is a super-2 number, since 2×813240004² = 1322718608211840032, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101654997 + ... + 101655004.

Almost surely, 2^813240004 is an apocalyptic number.

It is an amenable number.

813240004 is a deficient number, since it is larger than the sum of its proper divisors (609930010).

813240004 is a wasteful number, since it uses less digits than its factorization.

813240004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203310005 (or 203310003 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 813240004 is about 28517.3632020915. The cubic root of 813240004 is about 933.4109928011.

The spelling of 813240004 in words is "eight hundred thirteen million, two hundred forty thousand, four".