12400208 has 20 divisors (see below), whose sum is σ = 25439220. Its totient is φ = 5835264.

The previous prime is 12400183. The next prime is 12400231. The reversal of 12400208 is 80200421.

12400208 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 6210064 = 2488^2 + 2492^2 .

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 3 ways as a sum of consecutive naturals, for example, 22523 + ... + 23066.

It is an arithmetic number, because the mean of its divisors is an integer number (1271961).

Almost surely, 2^12400208 is an apocalyptic number.

It is an amenable number.

12400208 is an abundant number, since it is smaller than the sum of its proper divisors (13039012).

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

12400208 is a wasteful number, since it uses less digits than its factorization.

12400208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45614 (or 45608 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 12400208 is about 3521.3929062233. The cubic root of 12400208 is about 231.4601996242.

Adding to 12400208 its reverse (80200421), we get a palindrome (92600629).

The spelling of 12400208 in words is "twelve million, four hundred thousand, two hundred eight".