721724048 has 10 divisors (see below), whose sum is σ = 1398340374. Its totient is φ = 360862016.

The previous prime is 721724039. The next prime is 721724077. The reversal of 721724048 is 840427127.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 719741584 + 1982464 = 26828^2 + 1408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 721723999 and 721724017.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22553861 + ... + 22553892.

Almost surely, 2^721724048 is an apocalyptic number.

It is an amenable number.

721724048 is a deficient number, since it is larger than the sum of its proper divisors (676616326).

721724048 is a wasteful number, since it uses less digits than its factorization.

721724048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45107761 (or 45107755 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 721724048 is about 26864.9222593329. The cubic root of 721724048 is about 896.9957639681.

The spelling of 721724048 in words is "seven hundred twenty-one million, seven hundred twenty-four thousand, forty-eight".