681985432 has 16 divisors (see below), whose sum is σ = 1279067400. Its totient is φ = 340900800.

The previous prime is 681985427. The next prime is 681985471. The reversal of 681985432 is 234589186.

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, 28044 + ... + 46372.

Almost surely, 2^681985432 is an apocalyptic number.

It is an amenable number.

681985432 is a deficient number, since it is larger than the sum of its proper divisors (597081968).

681985432 is a wasteful number, since it uses less digits than its factorization.

681985432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22986 (or 22982 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 681985432 is about 26114.8507941363. The cubic root of 681985432 is about 880.2209465872.

The spelling of 681985432 in words is "six hundred eighty-one million, nine hundred eighty-five thousand, four hundred thirty-two".