12400244 has 6 divisors (see below), whose sum is σ = 21700434. Its totient is φ = 6200120.

The previous prime is 12400237. The next prime is 12400247. The reversal of 12400244 is 44200421.

It can be written as a sum of positive squares in only one way, i.e., 8352100 + 4048144 = 2890^2 + 2012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550027 + ... + 1550034.

It is an arithmetic number, because the mean of its divisors is an integer number (3616739).

Almost surely, 2^12400244 is an apocalyptic number.

It is an amenable number.

12400244 is a deficient number, since it is larger than the sum of its proper divisors (9300190).

12400244 is a wasteful number, since it uses less digits than its factorization.

12400244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100065 (or 3100063 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 12400244 is about 3521.3980178333. The cubic root of 12400244 is about 231.4604236139.

Adding to 12400244 its reverse (44200421), we get a palindrome (56600665).

The spelling of 12400244 in words is "twelve million, four hundred thousand, two hundred forty-four".