12142240440 has 64 divisors (see below), whose sum is σ = 39738245760. Its totient is φ = 2943573120.

The previous prime is 12142240433. The next prime is 12142240447. The reversal of 12142240440 is 4404224121.

It is an interprime number because it is at equal distance from previous prime (12142240433) and next prime (12142240447).

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 12142240440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12142240447) 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, 4598014 + ... + 4600653.

It is an arithmetic number, because the mean of its divisors is an integer number (620910090).

Almost surely, 2^12142240440 is an apocalyptic number.

12142240440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12142240440 is an abundant number, since it is smaller than the sum of its proper divisors (27596005320).

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

12142240440 is a wasteful number, since it uses less digits than its factorization.

12142240440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9198692 (or 9198688 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 12142240440 its reverse (4404224121), we get a palindrome (16546464561).

The spelling of 12142240440 in words is "twelve billion, one hundred forty-two million, two hundred forty thousand, four hundred forty".