721733264 has 40 divisors (see below), whose sum is σ = 1599385728. Its totient is φ = 309070080.

The previous prime is 721733263. The next prime is 721733267. The reversal of 721733264 is 462337127.

It is not an unprimeable number, because it can be changed into a prime (721733263) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 264869 + ... + 267579.

Almost surely, 2^721733264 is an apocalyptic number.

It is an amenable number.

721733264 is an abundant number, since it is smaller than the sum of its proper divisors (877652464).

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

721733264 is a wasteful number, since it uses less digits than its factorization.

721733264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103 (or 5097 counting only the distinct ones).

The product of its digits is 42336, while the sum is 35.

The square root of 721733264 is about 26865.0937835698. The cubic root of 721733264 is about 896.9995819914. Note that the first 3 decimals are identical.

The spelling of 721733264 in words is "seven hundred twenty-one million, seven hundred thirty-three thousand, two hundred sixty-four".