1311103404 has 72 divisors (see below), whose sum is σ = 3592944992. Its totient is φ = 400723200.

The previous prime is 1311103397. The next prime is 1311103457. The reversal of 1311103404 is 4043011131.

1311103404 is a `hidden beast` number, since 1 + 311 + 10 + 340 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61392 + ... + 79944.

Almost surely, 2^1311103404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311103404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1796472496).

1311103404 is an abundant number, since it is smaller than the sum of its proper divisors (2281841588).

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

1311103404 is a wasteful number, since it uses less digits than its factorization.

1311103404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18727 (or 18722 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1311103404 is about 36209.1618792813. The cubic root of 1311103404 is about 1094.4913030904.

Adding to 1311103404 its reverse (4043011131), we get a palindrome (5354114535).

The spelling of 1311103404 in words is "one billion, three hundred eleven million, one hundred three thousand, four hundred four".