1316991040 has 56 divisors (see below), whose sum is σ = 3272454720. Its totient is φ = 503889408.

The previous prime is 1316990993. The next prime is 1316991041. The reversal of 1316991040 is 401996131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1316990987 and 1316991005.

It is not an unprimeable number, because it can be changed into a prime (1316991041) 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, 82110 + ... + 96829.

Almost surely, 2^1316991040 is an apocalyptic number.

1316991040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316991040 is an abundant number, since it is smaller than the sum of its proper divisors (1955463680).

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

1316991040 is a wasteful number, since it uses less digits than its factorization.

1316991040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178979 (or 178969 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 1316991040 is about 36290.3711747345. The cubic root of 1316991040 is about 1096.1271630385.

The spelling of 1316991040 in words is "one billion, three hundred sixteen million, nine hundred ninety-one thousand, forty".