721959912 has 64 divisors (see below), whose sum is σ = 2009001600. Its totient is φ = 240226560.

The previous prime is 721959881. The next prime is 721959913. The reversal of 721959912 is 219959127.

It is a super-2 number, since 2×721959912² = 1042452229070095488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (721959913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133648 + ... + 138944.

It is an arithmetic number, because the mean of its divisors is an integer number (31390650).

Almost surely, 2^721959912 is an apocalyptic number.

721959912 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

721959912 is an abundant number, since it is smaller than the sum of its proper divisors (1287041688).

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

721959912 is a wasteful number, since it uses less digits than its factorization.

721959912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5943 (or 5933 counting only the distinct ones).

The product of its digits is 102060, while the sum is 45.

The square root of 721959912 is about 26869.3117142959. The cubic root of 721959912 is about 897.0934679618.

The spelling of 721959912 in words is "seven hundred twenty-one million, nine hundred fifty-nine thousand, nine hundred twelve".