721936480 has 24 divisors (see below), whose sum is σ = 1705575312. Its totient is φ = 288774528.

The previous prime is 721936447. The next prime is 721936507. The reversal of 721936480 is 84639127.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2255892 + ... + 2256211.

It is an arithmetic number, because the mean of its divisors is an integer number (71065638).

Almost surely, 2^721936480 is an apocalyptic number.

It is an amenable number.

721936480 is an abundant number, since it is smaller than the sum of its proper divisors (983638832).

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

721936480 is a wasteful number, since it uses less digits than its factorization.

721936480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512118 (or 4512110 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 721936480 is about 26868.8756742816. The cubic root of 721936480 is about 897.0837624730.

The spelling of 721936480 in words is "seven hundred twenty-one million, nine hundred thirty-six thousand, four hundred eighty".