720391752 has 64 divisors (see below), whose sum is σ = 2016921600. Its totient is φ = 238230720.

The previous prime is 720391747. The next prime is 720391753. The reversal of 720391752 is 257193027.

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

It is not an unprimeable number, because it can be changed into a prime (720391753) by changing a digit.

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, 14302 + ... + 40562.

It is an arithmetic number, because the mean of its divisors is an integer number (31514400).

Almost surely, 2^720391752 is an apocalyptic number.

720391752 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720391752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008460800).

720391752 is an abundant number, since it is smaller than the sum of its proper divisors (1296529848).

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

720391752 is a wasteful number, since it uses less digits than its factorization.

720391752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26403 (or 26393 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 720391752 is about 26840.1146048224. The cubic root of 720391752 is about 896.4434753264.

The spelling of 720391752 in words is "seven hundred twenty million, three hundred ninety-one thousand, seven hundred fifty-two".