1142027889 has 16 divisors (see below), whose sum is σ = 1605331200. Its totient is φ = 720162576.

The previous prime is 1142027869. The next prime is 1142027893. The reversal of 1142027889 is 9887202411.

It is not a de Polignac number, because 1142027889 - 2⁵ = 1142027857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1142027889.

It is not an unprimeable number, because it can be changed into a prime (1142027869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22362 + ... + 52764.

It is an arithmetic number, because the mean of its divisors is an integer number (100333200).

Almost surely, 2^1142027889 is an apocalyptic number.

1142027889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1142027889 is a deficient number, since it is larger than the sum of its proper divisors (463303311).

1142027889 is a wasteful number, since it uses less digits than its factorization.

1142027889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31084.

The product of its (nonzero) digits is 64512, while the sum is 42.

The square root of 1142027889 is about 33793.9031335535. The cubic root of 1142027889 is about 1045.2629815152.

The spelling of 1142027889 in words is "one billion, one hundred forty-two million, twenty-seven thousand, eight hundred eighty-nine".