12440369840 has 40 divisors (see below), whose sum is σ = 29539270080. Its totient is φ = 4870270976.

The previous prime is 12440369831. The next prime is 12440369941. The reversal of 12440369840 is 4896304421.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1650545 + ... + 1658064.

It is an arithmetic number, because the mean of its divisors is an integer number (738481752).

Almost surely, 2^12440369840 is an apocalyptic number.

12440369840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12440369840 is an abundant number, since it is smaller than the sum of its proper divisors (17098900240).

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

12440369840 is a wasteful number, since it uses less digits than its factorization.

12440369840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308669 (or 3308663 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The spelling of 12440369840 in words is "twelve billion, four hundred forty million, three hundred sixty-nine thousand, eight hundred forty".