4431685878 has 64 divisors (see below), whose sum is σ = 10214965440. Its totient is φ = 1423008000.

The previous prime is 4431685871. The next prime is 4431685889. The reversal of 4431685878 is 8785861344.

4431685878 is a `hidden beast` number, since 4 + 43 + 16 + 8 + 587 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431685871) 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 31 ways as a sum of consecutive naturals, for example, 190818 + ... + 212778.

It is an arithmetic number, because the mean of its divisors is an integer number (159608835).

Almost surely, 2^4431685878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4431685878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5107482720).

4431685878 is an abundant number, since it is smaller than the sum of its proper divisors (5783279562).

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

4431685878 is a wasteful number, since it uses less digits than its factorization.

4431685878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22110 (or 22104 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The square root of 4431685878 is about 66570.9086463449. The cubic root of 4431685878 is about 1642.5666085037.

The spelling of 4431685878 in words is "four billion, four hundred thirty-one million, six hundred eighty-five thousand, eight hundred seventy-eight".