12400440250 has 96 divisors (see below), whose sum is σ = 26729082432. Its totient is φ = 4271580000.

The previous prime is 12400440197. The next prime is 12400440257. The reversal of 12400440250 is 5204400421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (12400440257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 986505 + ... + 998995.

It is an arithmetic number, because the mean of its divisors is an integer number (278427942).

Almost surely, 2^12400440250 is an apocalyptic number.

12400440250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12400440250 is an abundant number, since it is smaller than the sum of its proper divisors (14328642182).

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

12400440250 is a wasteful number, since it uses less digits than its factorization.

12400440250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12557 (or 12528 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 12400440250 its reverse (5204400421), we get a palindrome (17604840671).

The spelling of 12400440250 in words is "twelve billion, four hundred million, four hundred forty thousand, two hundred fifty".