721199872 has 72 divisors (see below), whose sum is σ = 1564559360. Its totient is φ = 330531840.

The previous prime is 721199867. The next prime is 721199873. The reversal of 721199872 is 278991127.

It is not an unprimeable number, because it can be changed into a prime (721199873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148393 + ... + 153175.

Almost surely, 2^721199872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 721199872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (782279680).

721199872 is an abundant number, since it is smaller than the sum of its proper divisors (843359488).

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

721199872 is a wasteful number, since it uses less digits than its factorization.

721199872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4849 (or 4835 counting only the distinct ones).

The product of its digits is 127008, while the sum is 46.

The square root of 721199872 is about 26855.1647174245. The cubic root of 721199872 is about 896.7785537441.

The spelling of 721199872 in words is "seven hundred twenty-one million, one hundred ninety-nine thousand, eight hundred seventy-two".