681928008 has 32 divisors (see below), whose sum is σ = 1705656960. Its totient is φ = 227197760.

The previous prime is 681928007. The next prime is 681928033. The reversal of 681928008 is 800829186.

It is not an unprimeable number, because it can be changed into a prime (681928001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53713 + ... + 65183.

It is an arithmetic number, because the mean of its divisors is an integer number (53301780).

Almost surely, 2^681928008 is an apocalyptic number.

It is an amenable number.

681928008 is an abundant number, since it is smaller than the sum of its proper divisors (1023728952).

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

681928008 is a wasteful number, since it uses less digits than its factorization.

681928008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957 (or 13953 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 681928008 is about 26113.7513199464. The cubic root of 681928008 is about 880.1962406702.

The spelling of 681928008 in words is "six hundred eighty-one million, nine hundred twenty-eight thousand, eight".