1311002090 has 64 divisors (see below), whose sum is σ = 2715171840. Its totient is φ = 452459520.

The previous prime is 1311002089. The next prime is 1311002153. The reversal of 1311002090 is 902001131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93584 + ... + 106676.

It is an arithmetic number, because the mean of its divisors is an integer number (42424560).

Almost surely, 2^1311002090 is an apocalyptic number.

1311002090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1311002090 is an abundant number, since it is smaller than the sum of its proper divisors (1404169750).

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

1311002090 is a wasteful number, since it uses less digits than its factorization.

1311002090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13167.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1311002090 is about 36207.7628416891. The cubic root of 1311002090 is about 1094.4631105141.

The spelling of 1311002090 in words is "one billion, three hundred eleven million, two thousand, ninety".