12400206 has 48 divisors (see below), whose sum is σ = 30708864. Its totient is φ = 3268512.

The previous prime is 12400183. The next prime is 12400231. The reversal of 12400206 is 60200421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6225 + ... + 7971.

It is an arithmetic number, because the mean of its divisors is an integer number (639768).

Almost surely, 2^12400206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12400206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15354432).

12400206 is an abundant number, since it is smaller than the sum of its proper divisors (18308658).

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

12400206 is a wasteful number, since it uses less digits than its factorization.

12400206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1785 (or 1772 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12400206 is about 3521.3926222448. The cubic root of 12400206 is about 231.4601871803.

Adding to 12400206 its reverse (60200421), we get a palindrome (72600627).

The spelling of 12400206 in words is "twelve million, four hundred thousand, two hundred six".