2206406 has 4 divisors (see below), whose sum is σ = 3309612. Its totient is φ = 1103202.

The previous prime is 2206403. The next prime is 2206417. The reversal of 2206406 is 6046022.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2206403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551600 + ... + 551603.

It is an arithmetic number, because the mean of its divisors is an integer number (827403).

2^2206406 is an apocalyptic number.

2206406 is a deficient number, since it is larger than the sum of its proper divisors (1103206).

2206406 is a wasteful number, since it uses less digits than its factorization.

2206406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103205.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2206406 is about 1485.3975898728. The cubic root of 2206406 is about 130.1852585514.

The spelling of 2206406 in words is "two million, two hundred six thousand, four hundred six".