723900 has 72 divisors (see below), whose sum is σ = 2222080. Its totient is φ = 181440.

The previous prime is 723893. The next prime is 723901. The reversal of 723900 is 9327.

723900 = 3² + 4² + ... + 129².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (723901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5637 + ... + 5763.

2⁷²³⁹⁰⁰ 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 723900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111040).

723900 is an abundant number, since it is smaller than the sum of its proper divisors (1498180).

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

723900 is a wasteful number, since it uses less digits than its factorization.

723900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 21.

The square root of 723900 is about 850.8231308562. The cubic root of 723900 is about 89.7896321216.

The spelling of 723900 in words is "seven hundred twenty-three thousand, nine hundred".