721434884 has 12 divisors (see below), whose sum is σ = 1267795200. Its totient is φ = 359207688.

The previous prime is 721434863. The next prime is 721434919. The reversal of 721434884 is 488434127.

It is a happy 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, 376364 + ... + 378275.

It is an arithmetic number, because the mean of its divisors is an integer number (105649600).

Almost surely, 2^721434884 is an apocalyptic number.

It is an amenable number.

721434884 is a deficient number, since it is larger than the sum of its proper divisors (546360316).

721434884 is a wasteful number, since it uses less digits than its factorization.

721434884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754882 (or 754880 counting only the distinct ones).

The product of its digits is 172032, while the sum is 41.

The square root of 721434884 is about 26859.5399067073. The cubic root of 721434884 is about 896.8759520020.

The spelling of 721434884 in words is "seven hundred twenty-one million, four hundred thirty-four thousand, eight hundred eighty-four".