2099772 has 72 divisors (see below), whose sum is σ = 5818176. Its totient is φ = 635904.

The previous prime is 2099771. The next prime is 2099809. The reversal of 2099772 is 2779902.

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

It is a d-powerful number, because it can be written as 2³ + 0 + 9² + 9² + 7² + 7⁴ + 2²¹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099771) 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 23 ways as a sum of consecutive naturals, for example, 28728 + ... + 28800.

It is an arithmetic number, because the mean of its divisors is an integer number (80808).

2^2099772 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 2099772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2909088).

2099772 is an abundant number, since it is smaller than the sum of its proper divisors (3718404).

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

2099772 is a wasteful number, since it uses less digits than its factorization.

2099772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 2099772 is about 1449.0590050098. The cubic root of 2099772 is about 128.0532818540.

The spelling of 2099772 in words is "two million, ninety-nine thousand, seven hundred seventy-two".