699057990 has 48 divisors (see below), whose sum is σ = 1824683328. Its totient is φ = 185683968.

The previous prime is 699057971. The next prime is 699058007. The reversal of 699057990 is 99750996.

699057990 is a `hidden beast` number, since 69 + 9 + 0 + 579 + 9 + 0 = 666.

699057990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8019 + ... + 38241.

It is an arithmetic number, because the mean of its divisors is an integer number (38014236).

Almost surely, 2^699057990 is an apocalyptic number.

699057990 is an abundant number, since it is smaller than the sum of its proper divisors (1125625338).

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

699057990 is a wasteful number, since it uses less digits than its factorization.

699057990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30493 (or 30490 counting only the distinct ones).

The product of its (nonzero) digits is 1377810, while the sum is 54.

The square root of 699057990 is about 26439.7048016804. The cubic root of 699057990 is about 887.5055303497.

It can be divided in two parts, 6990 and 57990, that added together give a triangular number (64980 = T₃₆₀).

The spelling of 699057990 in words is "six hundred ninety-nine million, fifty-seven thousand, nine hundred ninety".