2006406 has 12 divisors (see below), whose sum is σ = 4347252. Its totient is φ = 668796.

The previous prime is 2006393. The next prime is 2006429. The reversal of 2006406 is 6046002.

2006406 is a `hidden beast` number, since 20 + 0 + 640 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 111467 = 2006406 / (2 + 0 + 0 + 6 + 4 + 0 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55716 + ... + 55751.

It is an arithmetic number, because the mean of its divisors is an integer number (362271).

2^2006406 is an apocalyptic number.

2006406 is an abundant number, since it is smaller than the sum of its proper divisors (2340846).

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

2006406 is a wasteful number, since it uses less digits than its factorization.

2006406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111475 (or 111472 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2006406 is about 1416.4766147028. The cubic root of 2006406 is about 126.1264791953.

The spelling of 2006406 in words is "two million, six thousand, four hundred six".