681373888 has 28 divisors (see below), whose sum is σ = 1456110880. Its totient is φ = 314479872.

The previous prime is 681373859. The next prime is 681373951. The reversal of 681373888 is 888373186.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 408648 + ... + 410311.

It is an arithmetic number, because the mean of its divisors is an integer number (52003960).

Almost surely, 2^681373888 is an apocalyptic number.

It is an amenable number.

681373888 is an abundant number, since it is smaller than the sum of its proper divisors (774736992).

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

681373888 is a wasteful number, since it uses less digits than its factorization.

681373888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818984 (or 818974 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 681373888 is about 26103.1394280458. The cubic root of 681373888 is about 879.9577665682.

The spelling of 681373888 in words is "six hundred eighty-one million, three hundred seventy-three thousand, eight hundred eighty-eight".