1029089868 has 12 divisors (see below), whose sum is σ = 2401209720. Its totient is φ = 343029952.

The previous prime is 1029089861. The next prime is 1029089869. The reversal of 1029089868 is 8689809201.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 1029089868.

It is not an unprimeable number, because it can be changed into a prime (1029089861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42878733 + ... + 42878756.

It is an arithmetic number, because the mean of its divisors is an integer number (200100810).

Almost surely, 2^1029089868 is an apocalyptic number.

It is an amenable number.

1029089868 is an abundant number, since it is smaller than the sum of its proper divisors (1372119852).

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

1029089868 is a wasteful number, since it uses less digits than its factorization.

1029089868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85757496 (or 85757494 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 1029089868 is about 32079.4306059194. The cubic root of 1029089868 is about 1009.6040888549.

The spelling of 1029089868 in words is "one billion, twenty-nine million, eighty-nine thousand, eight hundred sixty-eight".