813007928 has 8 divisors (see below), whose sum is σ = 1524389880. Its totient is φ = 406503960.

The previous prime is 813007913. The next prime is 813007931. The reversal of 813007928 is 829700318.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 813007891 and 813007900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50812988 + ... + 50813003.

It is an arithmetic number, because the mean of its divisors is an integer number (190548735).

Almost surely, 2^813007928 is an apocalyptic number.

It is an amenable number.

813007928 is a deficient number, since it is larger than the sum of its proper divisors (711381952).

813007928 is a wasteful number, since it uses less digits than its factorization.

813007928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101625997 (or 101625993 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 813007928 is about 28513.2938819772. The cubic root of 813007928 is about 933.3221945383.

The spelling of 813007928 in words is "eight hundred thirteen million, seven thousand, nine hundred twenty-eight".