681336832 has 56 divisors (see below), whose sum is σ = 1486658952. Its totient is φ = 309657600.

The previous prime is 681336793. The next prime is 681336841. The reversal of 681336832 is 238633186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86332 + ... + 93892.

Almost surely, 2^681336832 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 681336832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (743329476).

681336832 is an abundant number, since it is smaller than the sum of its proper divisors (805322120).

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

681336832 is an equidigital number, since it uses as much as digits as its factorization.

681336832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7598 (or 7574 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 681336832 is about 26102.4296187156. The cubic root of 681336832 is about 879.9418143347.

The spelling of 681336832 in words is "six hundred eighty-one million, three hundred thirty-six thousand, eight hundred thirty-two".