42866889 has 32 divisors (see below), whose sum is σ = 63431424. Its totient is φ = 25589760.

The previous prime is 42866839. The next prime is 42866891. The reversal of 42866889 is 98866824.

It is a happy number.

It is not a de Polignac number, because 42866889 - 2²⁰ = 41818313 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42866819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 312829 + ... + 312965.

It is an arithmetic number, because the mean of its divisors is an integer number (1982232).

Almost surely, 2^42866889 is an apocalyptic number.

It is an amenable number.

42866889 is a deficient number, since it is larger than the sum of its proper divisors (20564535).

42866889 is a wasteful number, since it uses less digits than its factorization.

42866889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337.

The product of its digits is 1327104, while the sum is 51.

The square root of 42866889 is about 6547.2810387213. The cubic root of 42866889 is about 349.9779278598.

It can be divided in two parts, 4286 and 6889, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 42866889 in words is "forty-two million, eight hundred sixty-six thousand, eight hundred eighty-nine".