12440189388 has 48 divisors (see below), whose sum is σ = 31677980544. Its totient is φ = 3768320640.

The previous prime is 12440189383. The next prime is 12440189393. The reversal of 12440189388 is 88398104421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12440189383) and next prime (12440189393).

It is not an unprimeable number, because it can be changed into a prime (12440189381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 360631 + ... + 393617.

It is an arithmetic number, because the mean of its divisors is an integer number (659957928).

Almost surely, 2^12440189388 is an apocalyptic number.

It is an amenable number.

12440189388 is an abundant number, since it is smaller than the sum of its proper divisors (19237791156).

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

12440189388 is a wasteful number, since it uses less digits than its factorization.

12440189388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35862 (or 35860 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The spelling of 12440189388 in words is "twelve billion, four hundred forty million, one hundred eighty-nine thousand, three hundred eighty-eight".