731685072 has 20 divisors (see below), whose sum is σ = 1890186560. Its totient is φ = 243895008.

The previous prime is 731685061. The next prime is 731685113. The reversal of 731685072 is 270586137.

It is a self number, because there is not a number n which added to its sum of digits gives 731685072.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7621672 + ... + 7621767.

It is an arithmetic number, because the mean of its divisors is an integer number (94509328).

Almost surely, 2^731685072 is an apocalyptic number.

It is an amenable number.

731685072 is an abundant number, since it is smaller than the sum of its proper divisors (1158501488).

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

731685072 is a wasteful number, since it uses less digits than its factorization.

731685072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15243450 (or 15243444 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 731685072 is about 27049.6778539043. The cubic root of 731685072 is about 901.1036140548.

The spelling of 731685072 in words is "seven hundred thirty-one million, six hundred eighty-five thousand, seventy-two".