1143581418 has 48 divisors (see below), whose sum is σ = 2929380480. Its totient is φ = 315469728.

The previous prime is 1143581401. The next prime is 1143581419. The reversal of 1143581418 is 8141853411.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1143581419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 152830 + ... + 160137.

It is an arithmetic number, because the mean of its divisors is an integer number (61028760).

Almost surely, 2^1143581418 is an apocalyptic number.

1143581418 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1143581418 is an abundant number, since it is smaller than the sum of its proper divisors (1785799062).

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

1143581418 is a wasteful number, since it uses less digits than its factorization.

1143581418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313011 (or 313008 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 1143581418 is about 33816.8806663181. The cubic root of 1143581418 is about 1045.7367325232.

The spelling of 1143581418 in words is "one billion, one hundred forty-three million, five hundred eighty-one thousand, four hundred eighteen".