684441280 has 28 divisors (see below), whose sum is σ = 1629826560. Its totient is φ = 273776384.

The previous prime is 684441259. The next prime is 684441287. The reversal of 684441280 is 82144486.

684441280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (684441287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069120 + ... + 1069759.

Almost surely, 2^684441280 is an apocalyptic number.

It is an amenable number.

684441280 is an abundant number, since it is smaller than the sum of its proper divisors (945385280).

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

684441280 is a wasteful number, since it uses less digits than its factorization.

684441280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138896 (or 2138886 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 37.

The square root of 684441280 is about 26161.8286822615. The cubic root of 684441280 is about 881.2762473614.

The spelling of 684441280 in words is "six hundred eighty-four million, four hundred forty-one thousand, two hundred eighty".