1318386642 has 16 divisors (see below), whose sum is σ = 2637491232. Its totient is φ = 439342560.

The previous prime is 1318386599. The next prime is 1318386679. The reversal of 1318386642 is 2466838131.

It is a junction number, because it is equal to n+sod(n) for n = 1318386594 and 1318386603.

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, 4363 + ... + 51534.

It is an arithmetic number, because the mean of its divisors is an integer number (164843202).

Almost surely, 2^1318386642 is an apocalyptic number.

1318386642 is an abundant number, since it is smaller than the sum of its proper divisors (1319104590).

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

1318386642 is a wasteful number, since it uses less digits than its factorization.

1318386642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59833.

The product of its digits is 165888, while the sum is 42.

The square root of 1318386642 is about 36309.5943519065. The cubic root of 1318386642 is about 1096.5142112863.

The spelling of 1318386642 in words is "one billion, three hundred eighteen million, three hundred eighty-six thousand, six hundred forty-two".