681487072 has 24 divisors (see below), whose sum is σ = 1533346416. Its totient is φ = 292065792.

The previous prime is 681487063. The next prime is 681487073. The reversal of 681487072 is 270784186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681487073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520953 + ... + 1521400.

It is an arithmetic number, because the mean of its divisors is an integer number (63889434).

Almost surely, 2^681487072 is an apocalyptic number.

It is an amenable number.

681487072 is an abundant number, since it is smaller than the sum of its proper divisors (851859344).

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

681487072 is a wasteful number, since it uses less digits than its factorization.

681487072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3042370 (or 3042362 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 681487072 is about 26105.3073531035. The cubic root of 681487072 is about 880.0064875555.

The spelling of 681487072 in words is "six hundred eighty-one million, four hundred eighty-seven thousand, seventy-two".