2099658 has 32 divisors (see below), whose sum is σ = 4743360. Its totient is φ = 613760.

The previous prime is 2099641. The next prime is 2099659. The reversal of 2099658 is 8569902.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2099659) 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, 1366 + ... + 2462.

It is an arithmetic number, because the mean of its divisors is an integer number (148230).

2^2099658 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2099658, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2371680).

2099658 is an abundant number, since it is smaller than the sum of its proper divisors (2643702).

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

2099658 is a wasteful number, since it uses less digits than its factorization.

2099658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 2099658 is about 1449.0196686036. The cubic root of 2099658 is about 128.0509644059.

The spelling of 2099658 in words is "two million, ninety-nine thousand, six hundred fifty-eight".