724222164 has 72 divisors (see below), whose sum is σ = 1833123040. Its totient is φ = 221761152.

The previous prime is 724222129. The next prime is 724222171. The reversal of 724222164 is 461222427.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2471602 + ... + 2471894.

Almost surely, 2^724222164 is an apocalyptic number.

724222164 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 724222164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (916561520).

724222164 is an abundant number, since it is smaller than the sum of its proper divisors (1108900876).

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

724222164 is a wasteful number, since it uses less digits than its factorization.

724222164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649 (or 354 counting only the distinct ones).

The product of its digits is 10752, while the sum is 30.

The square root of 724222164 is about 26911.3761075126. The cubic root of 724222164 is about 898.0295011993.

The spelling of 724222164 in words is "seven hundred twenty-four million, two hundred twenty-two thousand, one hundred sixty-four".