2113878 has 32 divisors (see below), whose sum is σ = 4671072. Its totient is φ = 633600.

The previous prime is 2113873. The next prime is 2113879. The reversal of 2113878 is 8783112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2868 + ... + 3528.

It is an arithmetic number, because the mean of its divisors is an integer number (145971).

2^2113878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2113878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2335536).

2113878 is an abundant number, since it is smaller than the sum of its proper divisors (2557194).

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

2113878 is a wasteful number, since it uses less digits than its factorization.

2113878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720.

The product of its digits is 2688, while the sum is 30.

The square root of 2113878 is about 1453.9181545053. The cubic root of 2113878 is about 128.3393906550.

The spelling of 2113878 in words is "two million, one hundred thirteen thousand, eight hundred seventy-eight".