1312426644 has 48 divisors (see below), whose sum is σ = 3219955200. Its totient is φ = 415249120.

The previous prime is 1312426597. The next prime is 1312426649. The reversal of 1312426644 is 4466242131.

It is a happy number.

It is a super-2 number, since 2×1312426644² = 3444927391762205472, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312426649) 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 15 ways as a sum of consecutive naturals, for example, 18007 + ... + 54305.

It is an arithmetic number, because the mean of its divisors is an integer number (67082400).

Almost surely, 2^1312426644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312426644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1609977600).

1312426644 is an abundant number, since it is smaller than the sum of its proper divisors (1907528556).

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

1312426644 is a wasteful number, since it uses less digits than its factorization.

1312426644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36460 (or 36458 counting only the distinct ones).

The product of its digits is 27648, while the sum is 33.

The square root of 1312426644 is about 36227.4294423438. The cubic root of 1312426644 is about 1094.8593868773.

Adding to 1312426644 its reverse (4466242131), we get a palindrome (5778668775).

The spelling of 1312426644 in words is "one billion, three hundred twelve million, four hundred twenty-six thousand, six hundred forty-four".