2199078 has 48 divisors (see below), whose sum is σ = 5630976. Its totient is φ = 606960.

The previous prime is 2199077. The next prime is 2199121. The reversal of 2199078 is 8709912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2199077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3625 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (117312).

2^2199078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2199078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2815488).

2199078 is an abundant number, since it is smaller than the sum of its proper divisors (3431898).

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

2199078 is a wasteful number, since it uses less digits than its factorization.

2199078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 606 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 2199078 is about 1482.9288587117. The cubic root of 2199078 is about 130.0409732780.

It can be divided in two parts, 21 and 99078, that added together give a palindrome (99099).

The spelling of 2199078 in words is "two million, one hundred ninety-nine thousand, seventy-eight".