1318436444 has 12 divisors (see below), whose sum is σ = 2484745704. Its totient is φ = 608509104.

The previous prime is 1318436437. The next prime is 1318436473. The reversal of 1318436444 is 4446348131.

It is a junction number, because it is equal to n+sod(n) for n = 1318436398 and 1318436407.

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, 12677222 + ... + 12677325.

It is an arithmetic number, because the mean of its divisors is an integer number (207062142).

Almost surely, 2^1318436444 is an apocalyptic number.

It is an amenable number.

1318436444 is a deficient number, since it is larger than the sum of its proper divisors (1166309260).

1318436444 is a wasteful number, since it uses less digits than its factorization.

1318436444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25354564 (or 25354562 counting only the distinct ones).

The product of its digits is 110592, while the sum is 38.

The square root of 1318436444 is about 36310.2801421305. The cubic root of 1318436444 is about 1096.5280180385.

The spelling of 1318436444 in words is "one billion, three hundred eighteen million, four hundred thirty-six thousand, four hundred forty-four".