1318448636 has 12 divisors (see below), whose sum is σ = 2308207440. Its totient is φ = 658960800.

The previous prime is 1318448597. The next prime is 1318448657. The reversal of 1318448636 is 6368448131.

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, 54401 + ... + 74808.

It is an arithmetic number, because the mean of its divisors is an integer number (192350620).

Almost surely, 2^1318448636 is an apocalyptic number.

It is an amenable number.

1318448636 is a deficient number, since it is larger than the sum of its proper divisors (989758804).

1318448636 is a wasteful number, since it uses less digits than its factorization.

1318448636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131764 (or 131762 counting only the distinct ones).

The product of its digits is 331776, while the sum is 44.

The square root of 1318448636 is about 36310.4480280814. The cubic root of 1318448636 is about 1096.5313980089.

The spelling of 1318448636 in words is "one billion, three hundred eighteen million, four hundred forty-eight thousand, six hundred thirty-six".