1309664944 has 30 divisors (see below), whose sum is σ = 2951759364. Its totient is φ = 561284640.

The previous prime is 1309664933. The next prime is 1309664957. The reversal of 1309664944 is 4494669031.

It is a junction number, because it is equal to n+sod(n) for n = 1309664894 and 1309664903.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 834462 + ... + 836029.

Almost surely, 2^1309664944 is an apocalyptic number.

1309664944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1309664944 is an abundant number, since it is smaller than the sum of its proper divisors (1642094420).

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

1309664944 is a wasteful number, since it uses less digits than its factorization.

1309664944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1670513 (or 1670500 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 46.

The square root of 1309664944 is about 36189.2932232725. The cubic root of 1309664944 is about 1094.0908876649.

The spelling of 1309664944 in words is "one billion, three hundred nine million, six hundred sixty-four thousand, nine hundred forty-four".