684299790 has 48 divisors (see below), whose sum is σ = 1817045568. Its totient is φ = 178596288.

The previous prime is 684299783. The next prime is 684299809. The reversal of 684299790 is 97992486.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 76657 + ... + 85116.

It is an arithmetic number, because the mean of its divisors is an integer number (37855116).

Almost surely, 2^684299790 is an apocalyptic number.

684299790 is an abundant number, since it is smaller than the sum of its proper divisors (1132745778).

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

684299790 is a wasteful number, since it uses less digits than its factorization.

684299790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161833 (or 161830 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 684299790 is about 26159.1244119523. The cubic root of 684299790 is about 881.2155163812.

The spelling of 684299790 in words is "six hundred eighty-four million, two hundred ninety-nine thousand, seven hundred ninety".