1311140304 has 40 divisors (see below), whose sum is σ = 3763459520. Its totient is φ = 437046624.

The previous prime is 1311140297. The next prime is 1311140309. The reversal of 1311140304 is 4030411131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311140309) 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, 1517092 + ... + 1517955.

It is an arithmetic number, because the mean of its divisors is an integer number (94086488).

Almost surely, 2^1311140304 is an apocalyptic number.

It is an amenable number.

1311140304 is an abundant number, since it is smaller than the sum of its proper divisors (2452319216).

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

1311140304 is a wasteful number, since it uses less digits than its factorization.

1311140304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3035064 (or 3035052 counting only the distinct ones).

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

The square root of 1311140304 is about 36209.6714152449. The cubic root of 1311140304 is about 1094.5015708669.

Adding to 1311140304 its reverse (4030411131), we get a palindrome (5341551435).

The spelling of 1311140304 in words is "one billion, three hundred eleven million, one hundred forty thousand, three hundred four".