720963280 has 40 divisors (see below), whose sum is σ = 1730317824. Its totient is φ = 279081600.

The previous prime is 720963263. The next prime is 720963301. The reversal of 720963280 is 82369027.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×720963280² = 1039576102216716800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142876 + ... + 147835.

Almost surely, 2^720963280 is an apocalyptic number.

It is an amenable number.

720963280 is an abundant number, since it is smaller than the sum of its proper divisors (1009354544).

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

720963280 is a wasteful number, since it uses less digits than its factorization.

720963280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290755 (or 290749 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 720963280 is about 26850.7593933579. The cubic root of 720963280 is about 896.6804792966.

The spelling of 720963280 in words is "seven hundred twenty million, nine hundred sixty-three thousand, two hundred eighty".