681278032 has 20 divisors (see below), whose sum is σ = 1377367200. Its totient is φ = 325828448.

The previous prime is 681278029. The next prime is 681278053. The reversal of 681278032 is 230872186.

It is a junction number, because it is equal to n+sod(n) for n = 681277982 and 681278000.

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, 925282 + ... + 926017.

It is an arithmetic number, because the mean of its divisors is an integer number (68868360).

Almost surely, 2^681278032 is an apocalyptic number.

It is an amenable number.

681278032 is an abundant number, since it is smaller than the sum of its proper divisors (696089168).

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

681278032 is a wasteful number, since it uses less digits than its factorization.

681278032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851330 (or 1851324 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 681278032 is about 26101.3032624810. The cubic root of 681278032 is about 879.9165003418.

The spelling of 681278032 in words is "six hundred eighty-one million, two hundred seventy-eight thousand, thirty-two".