681404072 has 32 divisors (see below), whose sum is σ = 1350086400. Its totient is φ = 321756864.

The previous prime is 681404071. The next prime is 681404089. The reversal of 681404072 is 270404186.

It is not an unprimeable number, because it can be changed into a prime (681404071) 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, 8903 + ... + 37974.

It is an arithmetic number, because the mean of its divisors is an integer number (42190200).

Almost surely, 2^681404072 is an apocalyptic number.

It is an amenable number.

681404072 is a deficient number, since it is larger than the sum of its proper divisors (668682328).

681404072 is a wasteful number, since it uses less digits than its factorization.

681404072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46985 (or 46981 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 681404072 is about 26103.7175896461. The cubic root of 681404072 is about 879.9707600477.

The spelling of 681404072 in words is "six hundred eighty-one million, four hundred four thousand, seventy-two".