681003870 has 64 divisors (see below), whose sum is σ = 1687564800. Its totient is φ = 175747968.

The previous prime is 681003811. The next prime is 681003887. The reversal of 681003870 is 78300186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219349 + ... + 222431.

It is an arithmetic number, because the mean of its divisors is an integer number (26368200).

Almost surely, 2^681003870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 681003870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843782400).

681003870 is an abundant number, since it is smaller than the sum of its proper divisors (1006560930).

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

681003870 is a wasteful number, since it uses less digits than its factorization.

681003870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3329.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 681003870 is about 26096.0508506555. The cubic root of 681003870 is about 879.7984516041.

The spelling of 681003870 in words is "six hundred eighty-one million, three thousand, eight hundred seventy".