42878164 has 48 divisors (see below), whose sum is σ = 90316800. Its totient is φ = 17414496.

The previous prime is 42878159. The next prime is 42878167. The reversal of 42878164 is 46187824.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42878167) 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 15 ways as a sum of consecutive naturals, for example, 89277 + ... + 89755.

It is an arithmetic number, because the mean of its divisors is an integer number (1881600).

Almost surely, 2^42878164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42878164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45158400).

42878164 is an abundant number, since it is smaller than the sum of its proper divisors (47438636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42878164 is a wasteful number, since it uses less digits than its factorization.

42878164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 42878164 is about 6548.1420265599. The cubic root of 42878164 is about 350.0086093120.

The spelling of 42878164 in words is "forty-two million, eight hundred seventy-eight thousand, one hundred sixty-four".