42887985 has 96 divisors (see below), whose sum is σ = 86676480. Its totient is φ = 18006912.

The previous prime is 42887983. The next prime is 42887989. The reversal of 42887985 is 58978824.

It is a happy number.

42887985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42887985 - 2¹ = 42887983 is a prime.

Its product of digits (1290240) is a multiple of the sum of its prime divisors (140).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42887983) 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 95 ways as a sum of consecutive naturals, for example, 726886 + ... + 726944.

It is an arithmetic number, because the mean of its divisors is an integer number (902880).

Almost surely, 2^42887985 is an apocalyptic number.

It is an amenable number.

42887985 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

42887985 is a wasteful number, since it uses less digits than its factorization.

42887985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 140 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 51.

The square root of 42887985 is about 6548.8918909996. The cubic root of 42887985 is about 350.0353297669.

The spelling of 42887985 in words is "forty-two million, eight hundred eighty-seven thousand, nine hundred eighty-five".