813887998 has 16 divisors (see below), whose sum is σ = 1522076544. Its totient is φ = 317099160.

The previous prime is 813887969. The next prime is 813888011. The reversal of 813887998 is 899788318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2642340 + ... + 2642647.

It is an arithmetic number, because the mean of its divisors is an integer number (95129784).

Almost surely, 2^813887998 is an apocalyptic number.

813887998 is a deficient number, since it is larger than the sum of its proper divisors (708188546).

813887998 is a wasteful number, since it uses less digits than its factorization.

813887998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5285007.

The product of its digits is 6967296, while the sum is 61.

The square root of 813887998 is about 28528.7223338165. The cubic root of 813887998 is about 933.6588426130.

The spelling of 813887998 in words is "eight hundred thirteen million, eight hundred eighty-seven thousand, nine hundred ninety-eight".