731545056 has 216 divisors, whose sum is σ = 2360665944. Its totient is φ = 212958720.

The previous prime is 731545051. The next prime is 731545079. The reversal of 731545056 is 650545137.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 731545056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731545051) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 9260025 + ... + 9260103.

It is an arithmetic number, because the mean of its divisors is an integer number (10929009).

Almost surely, 2^731545056 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 731545056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1180332972).

731545056 is an abundant number, since it is smaller than the sum of its proper divisors (1629120888).

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

731545056 is a wasteful number, since it uses less digits than its factorization.

731545056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The square root of 731545056 is about 27047.0896031348. The cubic root of 731545056 is about 901.0461316864.

It can be divided in two parts, 73154 and 5056, that added together give a triangular number (78210 = T₃₉₅).

The spelling of 731545056 in words is "seven hundred thirty-one million, five hundred forty-five thousand, fifty-six".