12400508 has 6 divisors (see below), whose sum is σ = 21700896. Its totient is φ = 6200252.

The previous prime is 12400489. The next prime is 12400511. The reversal of 12400508 is 80500421.

It is a self number, because there is not a number n which added to its sum of digits gives 12400508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550060 + ... + 1550067.

It is an arithmetic number, because the mean of its divisors is an integer number (3616816).

Almost surely, 2^12400508 is an apocalyptic number.

It is an amenable number.

12400508 is a deficient number, since it is larger than the sum of its proper divisors (9300388).

12400508 is a wasteful number, since it uses less digits than its factorization.

12400508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100131 (or 3100129 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12400508 is about 3521.4355027460. The cubic root of 12400508 is about 231.4620661923.

Adding to 12400508 its reverse (80500421), we get a palindrome (92900929).

The spelling of 12400508 in words is "twelve million, four hundred thousand, five hundred eight".