721954912 has 96 divisors (see below), whose sum is σ = 1794949632. Its totient is φ = 278513664.

The previous prime is 721954903. The next prime is 721954931. The reversal of 721954912 is 219459127.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83463 + ... + 91705.

It is an arithmetic number, because the mean of its divisors is an integer number (18697392).

Almost surely, 2^721954912 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 721954912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897474816).

721954912 is an abundant number, since it is smaller than the sum of its proper divisors (1072994720).

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

721954912 is a wasteful number, since it uses less digits than its factorization.

721954912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8300 (or 8292 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 721954912 is about 26869.2186711858. The cubic root of 721954912 is about 897.0913969892.

The spelling of 721954912 in words is "seven hundred twenty-one million, nine hundred fifty-four thousand, nine hundred twelve".