682757840 has 20 divisors (see below), whose sum is σ = 1587412164. Its totient is φ = 273103104.

The previous prime is 682757807. The next prime is 682757843. The reversal of 682757840 is 48757286.

It can be written as a sum of positive squares in 2 ways, for example, as 448422976 + 234334864 = 21176^2 + 15308^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682757843) 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, 4267157 + ... + 4267316.

Almost surely, 2^682757840 is an apocalyptic number.

It is an amenable number.

682757840 is an abundant number, since it is smaller than the sum of its proper divisors (904654324).

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

682757840 is a wasteful number, since it uses less digits than its factorization.

682757840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8534486 (or 8534480 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 47.

The square root of 682757840 is about 26129.6352825676. The cubic root of 682757840 is about 880.5531302147.

The spelling of 682757840 in words is "six hundred eighty-two million, seven hundred fifty-seven thousand, eight hundred forty".