42855189 has 24 divisors (see below), whose sum is σ = 62348832. Its totient is φ = 26170560.

The previous prime is 42855179. The next prime is 42855193. The reversal of 42855189 is 98155824.

It is a happy number.

It is not a de Polignac number, because 42855189 - 2⁴ = 42855173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42855189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42855119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91534 + ... + 92000.

It is an arithmetic number, because the mean of its divisors is an integer number (2597868).

Almost surely, 2^42855189 is an apocalyptic number.

It is an amenable number.

42855189 is a deficient number, since it is larger than the sum of its proper divisors (19493643).

42855189 is a wasteful number, since it uses less digits than its factorization.

42855189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 664 counting only the distinct ones).

The product of its digits is 115200, while the sum is 42.

The square root of 42855189 is about 6546.3874770747. The cubic root of 42855189 is about 349.9460842120.

The spelling of 42855189 in words is "forty-two million, eight hundred fifty-five thousand, one hundred eighty-nine".