1312433444 has 36 divisors (see below), whose sum is σ = 2733890544. Its totient is φ = 549387216.

The previous prime is 1312433443. The next prime is 1312433527. The reversal of 1312433444 is 4443342131.

It is a happy number.

It is a super-2 number, since 2×1312433444² = 3444963089859402272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312433443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69434 + ... + 86289.

It is an arithmetic number, because the mean of its divisors is an integer number (75941404).

Almost surely, 2^1312433444 is an apocalyptic number.

1312433444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1312433444 is an abundant number, since it is smaller than the sum of its proper divisors (1421457100).

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

1312433444 is a wasteful number, since it uses less digits than its factorization.

1312433444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155784 (or 155775 counting only the distinct ones).

The product of its digits is 13824, while the sum is 29.

The square root of 1312433444 is about 36227.5232937611. The cubic root of 1312433444 is about 1094.8612777845.

Adding to 1312433444 its reverse (4443342131), we get a palindrome (5755775575).

The spelling of 1312433444 in words is "one billion, three hundred twelve million, four hundred thirty-three thousand, four hundred forty-four".