731993872 has 20 divisors (see below), whose sum is σ = 1467143820. Its totient is φ = 353376128.

The previous prime is 731993819. The next prime is 731993881. The reversal of 731993872 is 278399137.

It can be written as a sum of positive squares in 2 ways, for example, as 411440656 + 320553216 = 20284^2 + 17904^2 .

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, 788323 + ... + 789250.

It is an arithmetic number, because the mean of its divisors is an integer number (73357191).

Almost surely, 2^731993872 is an apocalyptic number.

It is an amenable number.

731993872 is an abundant number, since it is smaller than the sum of its proper divisors (735149948).

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

731993872 is a wasteful number, since it uses less digits than its factorization.

731993872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1577610 (or 1577604 counting only the distinct ones).

The product of its digits is 571536, while the sum is 49.

The square root of 731993872 is about 27055.3852680016. The cubic root of 731993872 is about 901.2303633308.

The spelling of 731993872 in words is "seven hundred thirty-one million, nine hundred ninety-three thousand, eight hundred seventy-two".