682128557 has 32 divisors (see below), whose sum is σ = 815923200. Its totient is φ = 563371200.

The previous prime is 682128539. The next prime is 682128563. The reversal of 682128557 is 755821286.

It is a cyclic number.

It is not a de Polignac number, because 682128557 - 2⁸ = 682128301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (682128257) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 822419 + ... + 823247.

It is an arithmetic number, because the mean of its divisors is an integer number (25497600).

Almost surely, 2^682128557 is an apocalyptic number.

It is an amenable number.

682128557 is a deficient number, since it is larger than the sum of its proper divisors (133794643).

682128557 is a wasteful number, since it uses less digits than its factorization.

682128557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 268800, while the sum is 44.

The square root of 682128557 is about 26117.5909493965. The cubic root of 682128557 is about 880.2825181912.

The spelling of 682128557 in words is "six hundred eighty-two million, one hundred twenty-eight thousand, five hundred fifty-seven".