684049798 has 16 divisors (see below), whose sum is σ = 1035541584. Its totient is φ = 338884000.

The previous prime is 684049789. The next prime is 684049843. The reversal of 684049798 is 897940486.

It is a super-2 number, since 2×684049798² = 935848252287681608, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 95436 + ... + 102352.

It is an arithmetic number, because the mean of its divisors is an integer number (64721349).

Almost surely, 2^684049798 is an apocalyptic number.

684049798 is a deficient number, since it is larger than the sum of its proper divisors (351491786).

684049798 is a wasteful number, since it uses less digits than its factorization.

684049798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7367.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 684049798 is about 26154.3456809762. The cubic root of 684049798 is about 881.1081932144.

The spelling of 684049798 in words is "six hundred eighty-four million, forty-nine thousand, seven hundred ninety-eight".