2199906 has 16 divisors (see below), whose sum is σ = 4888800. Its totient is φ = 733284.

The previous prime is 2199893. The next prime is 2199907. The reversal of 2199906 is 6099912.

It is not an unprimeable number, because it can be changed into a prime (2199907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20316 + ... + 20423.

It is an arithmetic number, because the mean of its divisors is an integer number (305550).

2^2199906 is an apocalyptic number.

2199906 is an abundant number, since it is smaller than the sum of its proper divisors (2688894).

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

2199906 is a wasteful number, since it uses less digits than its factorization.

2199906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40750 (or 40744 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 2199906 is about 1483.2080096871. The cubic root of 2199906 is about 130.0572923012.

The spelling of 2199906 in words is "two million, one hundred ninety-nine thousand, nine hundred six".