723111228 has 144 divisors (see below), whose sum is σ = 2150948800. Its totient is φ = 204736896.

The previous prime is 723111211. The next prime is 723111229. The reversal of 723111228 is 822111327.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723111229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1938450 + ... + 1938822.

Almost surely, 2^723111228 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 723111228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075474400).

723111228 is an abundant number, since it is smaller than the sum of its proper divisors (1427837572).

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

723111228 is a wasteful number, since it uses less digits than its factorization.

723111228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 542 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 723111228 is about 26890.7275468701. The cubic root of 723111228 is about 897.5700823862.

Subtracting 723111228 from its reverse (822111327), we obtain a palindrome (99000099).

The spelling of 723111228 in words is "seven hundred twenty-three million, one hundred eleven thousand, two hundred twenty-eight".