1906406 has 8 divisors (see below), whose sum is σ = 2872584. Its totient is φ = 948880.

The previous prime is 1906393. The next prime is 1906417. The reversal of 1906406 is 6046091.

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

It is a congruent 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, 1580 + ... + 2511.

It is an arithmetic number, because the mean of its divisors is an integer number (359073).

2^1906406 is an apocalyptic number.

1906406 is a deficient number, since it is larger than the sum of its proper divisors (966178).

1906406 is a wasteful number, since it uses less digits than its factorization.

1906406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1906406 is about 1380.7266202982. The cubic root of 1906406 is about 123.9952738400.

The spelling of 1906406 in words is "one million, nine hundred six thousand, four hundred six".