123424400 has 60 divisors (see below), whose sum is σ = 323495664. Its totient is φ = 44880000.

The previous prime is 123424373. The next prime is 123424429. The reversal of 123424400 is 4424321.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 9626 + ... + 18425.

Almost surely, 2^123424400 is an apocalyptic number.

123424400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123424400 is an abundant number, since it is smaller than the sum of its proper divisors (200071264).

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

123424400 is a wasteful number, since it uses less digits than its factorization.

123424400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28080 (or 28069 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 123424400 is about 11109.6534599419. The cubic root of 123424400 is about 497.8903109439.

Adding to 123424400 its reverse (4424321), we get a palindrome (127848721).

The spelling of 123424400 in words is "one hundred twenty-three million, four hundred twenty-four thousand, four hundred".