690010990 has 16 divisors (see below), whose sum is σ = 1248961680. Its totient is φ = 274461760.

The previous prime is 690010987. The next prime is 690011027. The reversal of 690010990 is 99010096.

It is a happy number.

690010990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×690010990² = 952230332641560200, which contains 22 as substring.

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, 190951 + ... + 194530.

It is an arithmetic number, because the mean of its divisors is an integer number (78060105).

Almost surely, 2^690010990 is an apocalyptic number.

690010990 is a deficient number, since it is larger than the sum of its proper divisors (558950690).

690010990 is a wasteful number, since it uses less digits than its factorization.

690010990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385667.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 690010990 is about 26268.0602633693. The cubic root of 690010990 is about 883.6602837009.

The spelling of 690010990 in words is "six hundred ninety million, ten thousand, nine hundred ninety".