1312644492 has 36 divisors (see below), whose sum is σ = 3323936616. Its totient is φ = 436775040.

The previous prime is 1312644451. The next prime is 1312644517. The reversal of 1312644492 is 2944462131.

1312644492 is a `hidden beast` number, since 1 + 3 + 1 + 2 + 644 + 4 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11373 + ... + 52484.

Almost surely, 2^1312644492 is an apocalyptic number.

1312644492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312644492 is an abundant number, since it is smaller than the sum of its proper divisors (2011292124).

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

1312644492 is a wasteful number, since it uses less digits than its factorization.

1312644492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64438 (or 64433 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1312644492 is about 36230.4359896483. The cubic root of 1312644492 is about 1094.9199616234.

The spelling of 1312644492 in words is "one billion, three hundred twelve million, six hundred forty-four thousand, four hundred ninety-two".