12322015440 has 80 divisors (see below), whose sum is σ = 43655146368. Its totient is φ = 2816460288.

The previous prime is 12322015399. The next prime is 12322015487. The reversal of 12322015440 is 4451022321.

It is a tau number, because it is divible by the number of its divisors (80).

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 12322015440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3665587 + ... + 3668946.

Almost surely, 2^12322015440 is an apocalyptic number.

12322015440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12322015440 is an abundant number, since it is smaller than the sum of its proper divisors (31333130928).

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

12322015440 is a wasteful number, since it uses less digits than its factorization.

12322015440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7334556 (or 7334550 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 12322015440 its reverse (4451022321), we get a palindrome (16773037761).

The spelling of 12322015440 in words is "twelve billion, three hundred twenty-two million, fifteen thousand, four hundred forty".