1316242644 has 12 divisors (see below), whose sum is σ = 3071232864. Its totient is φ = 438747544.

The previous prime is 1316242637. The next prime is 1316242649. The reversal of 1316242644 is 4462426131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1316242644² = 3464989395768221472, 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 (1316242649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54843432 + ... + 54843455.

It is an arithmetic number, because the mean of its divisors is an integer number (255936072).

Almost surely, 2^1316242644 is an apocalyptic number.

It is an amenable number.

1316242644 is an abundant number, since it is smaller than the sum of its proper divisors (1754990220).

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

1316242644 is a wasteful number, since it uses less digits than its factorization.

1316242644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109686894 (or 109686892 counting only the distinct ones).

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

The square root of 1316242644 is about 36280.0584894788. The cubic root of 1316242644 is about 1095.9194945485.

Adding to 1316242644 its reverse (4462426131), we get a palindrome (5778668775).

The spelling of 1316242644 in words is "one billion, three hundred sixteen million, two hundred forty-two thousand, six hundred forty-four".