813966648 has 64 divisors (see below), whose sum is σ = 2223486720. Its totient is φ = 246259200.

The previous prime is 813966623. The next prime is 813966661. The reversal of 813966648 is 846669318.

It is a self number, because there is not a number n which added to its sum of digits gives 813966648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189808 + ... + 194048.

It is an arithmetic number, because the mean of its divisors is an integer number (34741980).

Almost surely, 2^813966648 is an apocalyptic number.

813966648 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

813966648 is an abundant number, since it is smaller than the sum of its proper divisors (1409520072).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813966648 is a wasteful number, since it uses less digits than its factorization.

813966648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4988 (or 4984 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 813966648 is about 28530.1007358895. The cubic root of 813966648 is about 933.6889163262.

The spelling of 813966648 in words is "eight hundred thirteen million, nine hundred sixty-six thousand, six hundred forty-eight".