1143311394 has 32 divisors (see below), whose sum is σ = 2299651200. Its totient is φ = 378940032.

The previous prime is 1143311369. The next prime is 1143311413. The reversal of 1143311394 is 4931133411.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089382 + ... + 1090430.

It is an arithmetic number, because the mean of its divisors is an integer number (71864100).

Almost surely, 2^1143311394 is an apocalyptic number.

1143311394 is an abundant number, since it is smaller than the sum of its proper divisors (1156339806).

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

1143311394 is a wasteful number, since it uses less digits than its factorization.

1143311394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1914.

The product of its digits is 3888, while the sum is 30.

The square root of 1143311394 is about 33812.8879866834. The cubic root of 1143311394 is about 1045.6544191177.

The spelling of 1143311394 in words is "one billion, one hundred forty-three million, three hundred eleven thousand, three hundred ninety-four".