1318318690 has 16 divisors (see below), whose sum is σ = 2555510328. Its totient is φ = 486763776.

The previous prime is 1318318619. The next prime is 1318318691. The reversal of 1318318690 is 968138131.

It can be written as a sum of positive squares in 4 ways, for example, as 957964401 + 360354289 = 30951^2 + 18983^2 .

It is a super-2 number, since 2×1318318690² = 3475928336806632200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1318318691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5070327 + ... + 5070586.

Almost surely, 2^1318318690 is an apocalyptic number.

1318318690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1318318690 is a deficient number, since it is larger than the sum of its proper divisors (1237191638).

1318318690 is a wasteful number, since it uses less digits than its factorization.

1318318690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10140933.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1318318690 is about 36308.6586092078. The cubic root of 1318318690 is about 1096.4953721962.

The spelling of 1318318690 in words is "one billion, three hundred eighteen million, three hundred eighteen thousand, six hundred ninety".