123304400 has 60 divisors (see below), whose sum is σ = 313681932. Its totient is φ = 46417920.

The previous prime is 123304399. The next prime is 123304411. The reversal of 123304400 is 4403321.

It can be written as a sum of positive squares in 6 ways, for example, as 183184 + 123121216 = 428^2 + 11096^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2267 + ... + 15866.

Almost surely, 2^123304400 is an apocalyptic number.

123304400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123304400 is an abundant number, since it is smaller than the sum of its proper divisors (190377532).

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

123304400 is a wasteful number, since it uses less digits than its factorization.

123304400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18168 (or 18157 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 123304400 is about 11104.2514380754. The cubic root of 123304400 is about 497.7288998268.

Adding to 123304400 its reverse (4403321), we get a palindrome (127707721).

The spelling of 123304400 in words is "one hundred twenty-three million, three hundred four thousand, four hundred".