1318136976 has 140 divisors (see below), whose sum is σ = 4124103228. Its totient is φ = 405533952.

The previous prime is 1318136917. The next prime is 1318136987. The reversal of 1318136976 is 6796318131.

It can be written as a sum of positive squares in 2 ways, for example, as 123743376 + 1194393600 = 11124^2 + 34560^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 147286 + ... + 155978.

Almost surely, 2^1318136976 is an apocalyptic number.

1318136976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318136976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2062051614).

1318136976 is an abundant number, since it is smaller than the sum of its proper divisors (2805966252).

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

1318136976 is an equidigital number, since it uses as much as digits as its factorization.

1318136976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8732 (or 8711 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 1318136976 is about 36306.1561721976. The cubic root of 1318136976 is about 1096.4449904191. Note that the first 3 decimals are identical.

The spelling of 1318136976 in words is "one billion, three hundred eighteen million, one hundred thirty-six thousand, nine hundred seventy-six".