1143189264 has 160 divisors (see below), whose sum is σ = 3570088960. Its totient is φ = 307929600.

The previous prime is 1143189233. The next prime is 1143189317. The reversal of 1143189264 is 4629813411.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 2112834 + ... + 2113374.

It is an arithmetic number, because the mean of its divisors is an integer number (22313056).

Almost surely, 2^1143189264 is an apocalyptic number.

1143189264 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1143189264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785044480).

1143189264 is an abundant number, since it is smaller than the sum of its proper divisors (2426899696).

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

1143189264 is a wasteful number, since it uses less digits than its factorization.

1143189264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909 (or 903 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 1143189264 is about 33811.0819702653. The cubic root of 1143189264 is about 1045.6171850732.

The spelling of 1143189264 in words is "one billion, one hundred forty-three million, one hundred eighty-nine thousand, two hundred sixty-four".