2108778 has 64 divisors (see below), whose sum is σ = 5253120. Its totient is φ = 551232.

The previous prime is 2108773. The next prime is 2108807. The reversal of 2108778 is 8778012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108773) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35713 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^2108778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2108778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2626560).

2108778 is an abundant number, since it is smaller than the sum of its proper divisors (3144342).

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

2108778 is a wasteful number, since it uses less digits than its factorization.

2108778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131.

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 2108778 is about 1452.1632139674. The cubic root of 2108778 is about 128.2360958293.

The spelling of 2108778 in words is "two million, one hundred eight thousand, seven hundred seventy-eight".