684398976 has 32 divisors (see below), whose sum is σ = 1817935800. Its totient is φ = 228132864.

The previous prime is 684398963. The next prime is 684398977. The reversal of 684398976 is 679893486.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684398977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890761 + ... + 891528.

Almost surely, 2^684398976 is an apocalyptic number.

It is an amenable number.

684398976 is an abundant number, since it is smaller than the sum of its proper divisors (1133536824).

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

684398976 is a wasteful number, since it uses less digits than its factorization.

684398976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782306 (or 1782294 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 60.

The square root of 684398976 is about 26161.0201635945. The cubic root of 684398976 is about 881.2580903236.

The spelling of 684398976 in words is "six hundred eighty-four million, three hundred ninety-eight thousand, nine hundred seventy-six".