681473584 has 40 divisors (see below), whose sum is σ = 1453889088. Its totient is φ = 306857280.

The previous prime is 681473579. The next prime is 681473591. The reversal of 681473584 is 485374186.

It is a happy 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, 739 + ... + 36925.

Almost surely, 2^681473584 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681473584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (726944544).

681473584 is an abundant number, since it is smaller than the sum of its proper divisors (772415504).

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

681473584 is a wasteful number, since it uses less digits than its factorization.

681473584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36313 (or 36307 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 681473584 is about 26105.0490135529. The cubic root of 681473584 is about 880.0006818177. Note that the first 3 decimals are identical.

The spelling of 681473584 in words is "six hundred eighty-one million, four hundred seventy-three thousand, five hundred eighty-four".