721334622 has 16 divisors (see below), whose sum is σ = 1460931840. Its totient is φ = 237401112.

The previous prime is 721334597. The next prime is 721334651. The reversal of 721334622 is 226433127.

It is a self number, because there is not a number n which added to its sum of digits gives 721334622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760428 + ... + 761375.

It is an arithmetic number, because the mean of its divisors is an integer number (91308240).

Almost surely, 2^721334622 is an apocalyptic number.

721334622 is an abundant number, since it is smaller than the sum of its proper divisors (739597218).

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

721334622 is a wasteful number, since it uses less digits than its factorization.

721334622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521887.

The product of its digits is 12096, while the sum is 30.

The square root of 721334622 is about 26857.6734286498. The cubic root of 721334622 is about 896.8344020554.

Adding to 721334622 its reverse (226433127), we get a palindrome (947767749).

The spelling of 721334622 in words is "seven hundred twenty-one million, three hundred thirty-four thousand, six hundred twenty-two".