799911990 has 32 divisors (see below), whose sum is σ = 2133099360. Its totient is φ = 213309792.

The previous prime is 799911961. The next prime is 799912007. The reversal of 799911990 is 99119997.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1481049 + ... + 1481588.

It is an arithmetic number, because the mean of its divisors is an integer number (66659355).

Almost surely, 2^799911990 is an apocalyptic number.

799911990 is an abundant number, since it is smaller than the sum of its proper divisors (1333187370).

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

799911990 is a wasteful number, since it uses less digits than its factorization.

799911990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962653 (or 2962647 counting only the distinct ones).

The product of its (nonzero) digits is 413343, while the sum is 54.

The square root of 799911990 is about 28282.7153929746. The cubic root of 799911990 is about 928.2837232880.

The spelling of 799911990 in words is "seven hundred ninety-nine million, nine hundred eleven thousand, nine hundred ninety".