1312639448 has 32 divisors (see below), whose sum is σ = 2550097920. Its totient is φ = 632772000.

The previous prime is 1312639369. The next prime is 1312639487. The reversal of 1312639448 is 8449362131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57443 + ... + 76973.

It is an arithmetic number, because the mean of its divisors is an integer number (79690560).

Almost surely, 2^1312639448 is an apocalyptic number.

It is an amenable number.

1312639448 is a deficient number, since it is larger than the sum of its proper divisors (1237458472).

1312639448 is a wasteful number, since it uses less digits than its factorization.

1312639448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19839 (or 19835 counting only the distinct ones).

The product of its digits is 124416, while the sum is 41.

The square root of 1312639448 is about 36230.3663795993. The cubic root of 1312639448 is about 1094.9185591661.

The spelling of 1312639448 in words is "one billion, three hundred twelve million, six hundred thirty-nine thousand, four hundred forty-eight".