840002889 has 8 divisors (see below), whose sum is σ = 1221822432. Its totient is φ = 509092640.

The previous prime is 840002887. The next prime is 840002953. The reversal of 840002889 is 988200048.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840002889 - 2¹ = 840002887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840002881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12727284 + ... + 12727349.

It is an arithmetic number, because the mean of its divisors is an integer number (152727804).

Almost surely, 2^840002889 is an apocalyptic number.

It is an amenable number.

840002889 is a deficient number, since it is larger than the sum of its proper divisors (381819543).

840002889 is a wasteful number, since it uses less digits than its factorization.

840002889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25454647.

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 840002889 is about 28982.8033323210. The cubic root of 840002889 is about 943.5398777619.

The spelling of 840002889 in words is "eight hundred forty million, two thousand, eight hundred eighty-nine".