12040243240 has 32 divisors (see below), whose sum is σ = 27230930280. Its totient is φ = 4791140352.

The previous prime is 12040243231. The next prime is 12040243277. The reversal of 12040243240 is 4234204021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 5010091524 + 7030151716 = 70782^2 + 83846^2 .

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, 772089 + ... + 787528.

Almost surely, 2^12040243240 is an apocalyptic number.

12040243240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040243240 is an abundant number, since it is smaller than the sum of its proper divisors (15190687040).

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

12040243240 is a wasteful number, since it uses less digits than its factorization.

12040243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559821 (or 1559817 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 12040243240 its reverse (4234204021), we get a palindrome (16274447261).

The spelling of 12040243240 in words is "twelve billion, forty million, two hundred forty-three thousand, two hundred forty".