123230400 has 84 divisors (see below), whose sum is σ = 404314152. Its totient is φ = 32860160.

The previous prime is 123230339. The next prime is 123230407. The reversal of 123230400 is 4032321.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123230400.

It is not an unprimeable number, because it can be changed into a prime (123230407) 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 11 ways as a sum of consecutive naturals, for example, 8037 + ... + 17636.

Almost surely, 2^123230400 is an apocalyptic number.

123230400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123230400 is an abundant number, since it is smaller than the sum of its proper divisors (281083752).

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

123230400 is a wasteful number, since it uses less digits than its factorization.

123230400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25698 (or 25683 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 123230400 is about 11100.9188808855. The cubic root of 123230400 is about 497.6293107633.

Adding to 123230400 its reverse (4032321), we get a palindrome (127262721).

The spelling of 123230400 in words is "one hundred twenty-three million, two hundred thirty thousand, four hundred".