720916992 has 120 divisors (see below), whose sum is σ = 2102571900. Its totient is φ = 237772800.

The previous prime is 720916957. The next prime is 720917017. The reversal of 720916992 is 299619027.

It can be written as a sum of positive squares in 2 ways, for example, as 689377536 + 31539456 = 26256^2 + 5616^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 464634 + ... + 466182.

Almost surely, 2^720916992 is an apocalyptic number.

720916992 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 720916992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051285950).

720916992 is an abundant number, since it is smaller than the sum of its proper divisors (1381654908).

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

720916992 is a wasteful number, since it uses less digits than its factorization.

720916992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1674 (or 1655 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 720916992 is about 26849.8974299717. The cubic root of 720916992 is about 896.6612890292.

The spelling of 720916992 in words is "seven hundred twenty million, nine hundred sixteen thousand, nine hundred ninety-two".