12040320440 has 64 divisors (see below), whose sum is σ = 27386359200. Its totient is φ = 4763860992.

The previous prime is 12040320407. The next prime is 12040320443. The reversal of 12040320440 is 4402304021.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040320443) 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, 1377524 + ... + 1386236.

Almost surely, 2^12040320440 is an apocalyptic number.

12040320440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040320440 is an abundant number, since it is smaller than the sum of its proper divisors (15346038760).

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

12040320440 is a wasteful number, since it uses less digits than its factorization.

12040320440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096 (or 9092 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 12040320440 its reverse (4402304021), we get a palindrome (16442624461).

The spelling of 12040320440 in words is "twelve billion, forty million, three hundred twenty thousand, four hundred forty".