684680280 has 64 divisors (see below), whose sum is σ = 2078818560. Its totient is φ = 180379008.

The previous prime is 684680273. The next prime is 684680327. The reversal of 684680280 is 82086486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24412 + ... + 44331.

It is an arithmetic number, because the mean of its divisors is an integer number (32481540).

Almost surely, 2^684680280 is an apocalyptic number.

684680280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

684680280 is an abundant number, since it is smaller than the sum of its proper divisors (1394138280).

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

684680280 is a wasteful number, since it uses less digits than its factorization.

684680280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68840 (or 68836 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 684680280 is about 26166.3960070928. The cubic root of 684680280 is about 881.3788130199.

The spelling of 684680280 in words is "six hundred eighty-four million, six hundred eighty thousand, two hundred eighty".