721882812 has 24 divisors (see below), whose sum is σ = 1925021056. Its totient is φ = 206252208.

The previous prime is 721882801. The next prime is 721882817. The reversal of 721882812 is 218288127.

721882812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×721882812² = 1042229588522054688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721882817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4296838 + ... + 4297005.

Almost surely, 2^721882812 is an apocalyptic number.

It is an amenable number.

721882812 is an abundant number, since it is smaller than the sum of its proper divisors (1203138244).

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

721882812 is a wasteful number, since it uses less digits than its factorization.

721882812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8593857 (or 8593855 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 721882812 is about 26867.8769537156. The cubic root of 721882812 is about 897.0615325005.

The spelling of 721882812 in words is "seven hundred twenty-one million, eight hundred eighty-two thousand, eight hundred twelve".