1143358864 has 40 divisors (see below), whose sum is σ = 2314351872. Its totient is φ = 546552960.

The previous prime is 1143358861. The next prime is 1143358871. The reversal of 1143358864 is 4688533411.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1143358864.

It is not an unprimeable number, because it can be changed into a prime (1143358861) 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, 27282 + ... + 55054.

Almost surely, 2^1143358864 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 1143358864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1157175936).

1143358864 is an abundant number, since it is smaller than the sum of its proper divisors (1170993008).

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

1143358864 is a wasteful number, since it uses less digits than its factorization.

1143358864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27895 (or 27889 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 1143358864 is about 33813.5899306773. The cubic root of 1143358864 is about 1045.6688906864.

The spelling of 1143358864 in words is "one billion, one hundred forty-three million, three hundred fifty-eight thousand, eight hundred sixty-four".