123430400 has 60 divisors (see below), whose sum is σ = 305840172. Its totient is φ = 49367040.

The previous prime is 123430399. The next prime is 123430423. The reversal of 123430400 is 4034321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7979 + ... + 17621.

Almost surely, 2^123430400 is an apocalyptic number.

123430400 is a gapful number since it is divisible by the number (10) 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 123430400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152920086).

123430400 is an abundant number, since it is smaller than the sum of its proper divisors (182409772).

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

123430400 is an frugal number, since it uses more digits than its factorization.

123430400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9671 (or 9650 counting only the distinct ones).

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

The square root of 123430400 is about 11109.9234920858. The cubic root of 123430400 is about 497.8983787529.

Adding to 123430400 its reverse (4034321), we get a palindrome (127464721).

The spelling of 123430400 in words is "one hundred twenty-three million, four hundred thirty thousand, four hundred".