721008227828 has 12 divisors (see below), whose sum is σ = 1442016455712. Its totient is φ = 309003526200.

The previous prime is 721008227813. The next prime is 721008227833. The reversal of 721008227828 is 828722800127.

721008227828 is an admirable number.

It is a congruent 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, 12875146898 + ... + 12875146953.

It is an arithmetic number, because the mean of its divisors is an integer number (120168037976).

Almost surely, 2^721008227828 is an apocalyptic number.

It is an amenable number.

721008227828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

721008227828 is a wasteful number, since it uses less digits than its factorization.

721008227828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25750293862 (or 25750293860 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 47.

It can be divided in two parts, 72100 and 8227828, that added together give a palindrome (8299928).

The spelling of 721008227828 in words is "seven hundred twenty-one billion, eight million, two hundred twenty-seven thousand, eight hundred twenty-eight".