1312440144 has 40 divisors (see below), whose sum is σ = 3408061632. Its totient is φ = 435210240.

The previous prime is 1312440139. The next prime is 1312440169. The reversal of 1312440144 is 4410442131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 61572 + ... + 80099.

Almost surely, 2^1312440144 is an apocalyptic number.

It is an amenable number.

1312440144 is an abundant number, since it is smaller than the sum of its proper divisors (2095621488).

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

1312440144 is a wasteful number, since it uses less digits than its factorization.

1312440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141875 (or 141869 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1312440144 is about 36227.6157647726. The cubic root of 1312440144 is about 1094.8631408778.

Adding to 1312440144 its reverse (4410442131), we get a palindrome (5722882275).

The spelling of 1312440144 in words is "one billion, three hundred twelve million, four hundred forty thousand, one hundred forty-four".