2108906 has 8 divisors (see below), whose sum is σ = 3170340. Its totient is φ = 1052128.

The previous prime is 2108881. The next prime is 2108927. The reversal of 2108906 is 6098012.

It can be written as a sum of positive squares in 2 ways, for example, as 1666681 + 442225 = 1291^2 + 665^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380 + ... + 2088.

2^2108906 is an apocalyptic number.

2108906 is a deficient number, since it is larger than the sum of its proper divisors (1061434).

2108906 is a wasteful number, since it uses less digits than its factorization.

2108906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 2108906 is about 1452.2072854796. The cubic root of 2108906 is about 128.2386903633.

The spelling of 2108906 in words is "two million, one hundred eight thousand, nine hundred six".