4189878 has 48 divisors (see below), whose sum is σ = 11321856. Its totient is φ = 1087920.

The previous prime is 4189849. The next prime is 4189879. The reversal of 4189878 is 8789814.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4189879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126 + ... + 2897.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

Almost surely, 2^4189878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4189878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5660928).

4189878 is an abundant number, since it is smaller than the sum of its proper divisors (7131978).

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

4189878 is a wasteful number, since it uses less digits than its factorization.

4189878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3046 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 4189878 is about 2046.9191483789. The cubic root of 4189878 is about 161.2131482399.

It can be divided in two parts, 418 and 9878, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 4189878 in words is "four million, one hundred eighty-nine thousand, eight hundred seventy-eight".