720756752 has 80 divisors (see below), whose sum is σ = 1520460720. Its totient is φ = 330856448.

The previous prime is 720756733. The next prime is 720756767. The reversal of 720756752 is 257657027.

It can be written as a sum of positive squares in 8 ways, for example, as 111851776 + 608904976 = 10576^2 + 24676^2 .

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 15 ways as a sum of consecutive naturals, for example, 4166138 + ... + 4166310.

It is an arithmetic number, because the mean of its divisors is an integer number (19005759).

Almost surely, 2^720756752 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 720756752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (760230360).

720756752 is an abundant number, since it is smaller than the sum of its proper divisors (799703968).

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

720756752 is a wasteful number, since it uses less digits than its factorization.

720756752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 720756752 is about 26846.9132676366. The cubic root of 720756752 is about 896.5948497335.

The spelling of 720756752 in words is "seven hundred twenty million, seven hundred fifty-six thousand, seven hundred fifty-two".