813887968 has 12 divisors (see below), whose sum is σ = 1602342000. Its totient is φ = 406943968.

The previous prime is 813887939. The next prime is 813887969. The reversal of 813887968 is 869788318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813887969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12716968 + ... + 12717031.

It is an arithmetic number, because the mean of its divisors is an integer number (133528500).

Almost surely, 2^813887968 is an apocalyptic number.

It is an amenable number.

813887968 is a deficient number, since it is larger than the sum of its proper divisors (788454032).

813887968 is a wasteful number, since it uses less digits than its factorization.

813887968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25434009 (or 25434001 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 58.

The square root of 813887968 is about 28528.7218080306. The cubic root of 813887968 is about 933.6588311414.

The spelling of 813887968 in words is "eight hundred thirteen million, eight hundred eighty-seven thousand, nine hundred sixty-eight".