684247360 has 56 divisors (see below), whose sum is σ = 1669136616. Its totient is φ = 267018240.

The previous prime is 684247321. The next prime is 684247379. The reversal of 684247360 is 63742486.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92006464 + 592240896 = 9592^2 + 24336^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12957 + ... + 39196.

It is an arithmetic number, because the mean of its divisors is an integer number (29806011).

Almost surely, 2^684247360 is an apocalyptic number.

It is an amenable number.

684247360 is an abundant number, since it is smaller than the sum of its proper divisors (984889256).

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

684247360 is a wasteful number, since it uses less digits than its factorization.

684247360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52211 (or 52201 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 40.

The square root of 684247360 is about 26158.1222567676. The cubic root of 684247360 is about 881.1930100127.

The spelling of 684247360 in words is "six hundred eighty-four million, two hundred forty-seven thousand, three hundred sixty".