1318881944 has 16 divisors (see below), whose sum is σ = 2473995120. Its totient is φ = 659149920.

The previous prime is 1318881911. The next prime is 1318881959. The reversal of 1318881944 is 4491888131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16484 + ... + 53939.

It is an arithmetic number, because the mean of its divisors is an integer number (154624695).

Almost surely, 2^1318881944 is an apocalyptic number.

It is an amenable number.

1318881944 is a deficient number, since it is larger than the sum of its proper divisors (1155113176).

1318881944 is a wasteful number, since it uses less digits than its factorization.

1318881944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72770 (or 72766 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 1318881944 is about 36316.4142503084. The cubic root of 1318881944 is about 1096.6515098263.

The spelling of 1318881944 in words is "one billion, three hundred eighteen million, eight hundred eighty-one thousand, nine hundred forty-four".