690390992 has 40 divisors (see below), whose sum is σ = 1446112800. Its totient is φ = 318183552.

The previous prime is 690390991. The next prime is 690390997. The reversal of 690390992 is 299093096.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690390991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19442 + ... + 41937.

It is an arithmetic number, because the mean of its divisors is an integer number (36152820).

Almost surely, 2^690390992 is an apocalyptic number.

It is an amenable number.

690390992 is an abundant number, since it is smaller than the sum of its proper divisors (755721808).

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

690390992 is a wasteful number, since it uses less digits than its factorization.

690390992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61443 (or 61437 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 47.

The square root of 690390992 is about 26275.2924246335. The cubic root of 690390992 is about 883.8224700315.

The spelling of 690390992 in words is "six hundred ninety million, three hundred ninety thousand, nine hundred ninety-two".