720553944 has 64 divisors (see below), whose sum is σ = 1990080000. Its totient is φ = 215579520.

The previous prime is 720553919. The next prime is 720553949. The reversal of 720553944 is 449355027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720553949) 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 15 ways as a sum of consecutive naturals, for example, 3582 + ... + 38130.

It is an arithmetic number, because the mean of its divisors is an integer number (31095000).

Almost surely, 2^720553944 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 720553944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (995040000).

720553944 is an abundant number, since it is smaller than the sum of its proper divisors (1269526056).

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

720553944 is a wasteful number, since it uses less digits than its factorization.

720553944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34648 (or 34644 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 720553944 is about 26843.1358823816. The cubic root of 720553944 is about 896.5107466175.

The spelling of 720553944 in words is "seven hundred twenty million, five hundred fifty-three thousand, nine hundred forty-four".