1311812990 has 16 divisors (see below), whose sum is σ = 2500161552. Its totient is φ = 493858944.

The previous prime is 1311812959. The next prime is 1311813001. The reversal of 1311812990 is 992181131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311812990.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3858104 + ... + 3858443.

It is an arithmetic number, because the mean of its divisors is an integer number (156260097).

Almost surely, 2^1311812990 is an apocalyptic number.

1311812990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311812990 is a deficient number, since it is larger than the sum of its proper divisors (1188348562).

1311812990 is a wasteful number, since it uses less digits than its factorization.

1311812990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7716571.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 1311812990 is about 36218.9589855921. The cubic root of 1311812990 is about 1094.6887183965.

The spelling of 1311812990 in words is "one billion, three hundred eleven million, eight hundred twelve thousand, nine hundred ninety".