12003640440 has 96 divisors (see below), whose sum is σ = 39582300240. Its totient is φ = 2909969920.

The previous prime is 12003640409. The next prime is 12003640459. The reversal of 12003640440 is 4404630021.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12003640440.

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, 398829 + ... + 427868.

Almost surely, 2^12003640440 is an apocalyptic number.

12003640440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12003640440 is an abundant number, since it is smaller than the sum of its proper divisors (27578659800).

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

12003640440 is a wasteful number, since it uses less digits than its factorization.

12003640440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826733 (or 826718 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The spelling of 12003640440 in words is "twelve billion, three million, six hundred forty thousand, four hundred forty".