731791056 has 80 divisors (see below), whose sum is σ = 1919662848. Its totient is φ = 240192000.

The previous prime is 731791033. The next prime is 731791091. The reversal of 731791056 is 650197137.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1313530 + ... + 1314086.

Almost surely, 2^731791056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731791056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959831424).

731791056 is an abundant number, since it is smaller than the sum of its proper divisors (1187871792).

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

731791056 is a wasteful number, since it uses less digits than its factorization.

731791056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 39.

The square root of 731791056 is about 27051.6368451153. The cubic root of 731791056 is about 901.1471200012.

The spelling of 731791056 in words is "seven hundred thirty-one million, seven hundred ninety-one thousand, fifty-six".