4139856 has 120 divisors (see below), whose sum is σ = 13957440. Its totient is φ = 1150848.

The previous prime is 4139831. The next prime is 4139873. The reversal of 4139856 is 6589314.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 4139856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111870 + ... + 111906.

It is an arithmetic number, because the mean of its divisors is an integer number (116312).

Almost surely, 2^4139856 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 4139856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6978720).

4139856 is an abundant number, since it is smaller than the sum of its proper divisors (9817584).

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

4139856 is a wasteful number, since it uses less digits than its factorization.

4139856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 49 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 4139856 is about 2034.6636085604. The cubic root of 4139856 is about 160.5690156502.

The spelling of 4139856 in words is "four million, one hundred thirty-nine thousand, eight hundred fifty-six".