681372832 has 72 divisors (see below), whose sum is σ = 1642667040. Its totient is φ = 276635520.

The previous prime is 681372829. The next prime is 681372841. The reversal of 681372832 is 238273186.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18357 + ... + 41227.

It is an arithmetic number, because the mean of its divisors is an integer number (22814820).

Almost surely, 2^681372832 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 681372832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (821333520).

681372832 is an abundant number, since it is smaller than the sum of its proper divisors (961294208).

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

681372832 is a wasteful number, since it uses less digits than its factorization.

681372832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22914 (or 22899 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 681372832 is about 26103.1192005860. The cubic root of 681372832 is about 879.9573119789.

The spelling of 681372832 in words is "six hundred eighty-one million, three hundred seventy-two thousand, eight hundred thirty-two".