681328458 has 24 divisors (see below), whose sum is σ = 1478691396. Its totient is φ = 226728000.

The previous prime is 681328441. The next prime is 681328493. The reversal of 681328458 is 854823186.

681328458 is a `hidden beast` number, since 68 + 132 + 8 + 458 = 666.

681328458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 622851849 + 58476609 = 24957^2 + 7647^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20673 + ... + 42308.

Almost surely, 2^681328458 is an apocalyptic number.

681328458 is an abundant number, since it is smaller than the sum of its proper divisors (797362938).

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

681328458 is a wasteful number, since it uses less digits than its factorization.

681328458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63590 (or 63587 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 681328458 is about 26102.2692116988. The cubic root of 681328458 is about 879.9382093322.

The spelling of 681328458 in words is "six hundred eighty-one million, three hundred twenty-eight thousand, four hundred fifty-eight".