12400024240 has 20 divisors (see below), whose sum is σ = 28830056544. Its totient is φ = 4960009664.

The previous prime is 12400024229. The next prime is 12400024393. The reversal of 12400024240 is 4242000421.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77500072 + ... + 77500231.

Almost surely, 2^12400024240 is an apocalyptic number.

12400024240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400024240 is an abundant number, since it is smaller than the sum of its proper divisors (16430032304).

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

12400024240 is a wasteful number, since it uses less digits than its factorization.

12400024240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155000316 (or 155000310 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 12400024240 its reverse (4242000421), we get a palindrome (16642024661).

It can be divided in two parts, 124000 and 24240, that added together give a triangular number (148240 = T₅₄₄).

The spelling of 12400024240 in words is "twelve billion, four hundred million, twenty-four thousand, two hundred forty".