1318539684 has 48 divisors (see below), whose sum is σ = 3835754496. Its totient is φ = 342477600.

The previous prime is 1318539619. The next prime is 1318539689. The reversal of 1318539684 is 4869358131.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1318539689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712572 + ... + 714419.

It is an arithmetic number, because the mean of its divisors is an integer number (79911552).

Almost surely, 2^1318539684 is an apocalyptic number.

1318539684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1318539684 is an abundant number, since it is smaller than the sum of its proper divisors (2517214812).

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

1318539684 is a wasteful number, since it uses less digits than its factorization.

1318539684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427016 (or 1427014 counting only the distinct ones).

The product of its digits is 622080, while the sum is 48.

The square root of 1318539684 is about 36311.7017502623. The cubic root of 1318539684 is about 1096.5566384543.

The spelling of 1318539684 in words is "one billion, three hundred eighteen million, five hundred thirty-nine thousand, six hundred eighty-four".