1606904 has 16 divisors (see below), whose sum is σ = 3244920. Its totient is φ = 741600.

The previous prime is 1606901. The next prime is 1606909. The reversal of 1606904 is 4096061.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1606901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7622 + ... + 7829.

2^1606904 is an apocalyptic number.

It is an amenable number.

1606904 is an abundant number, since it is smaller than the sum of its proper divisors (1638016).

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

1606904 is a wasteful number, since it uses less digits than its factorization.

1606904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15470 (or 15466 counting only the distinct ones).

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

The square root of 1606904 is about 1267.6371720646. The cubic root of 1606904 is about 117.1286966255.

The spelling of 1606904 in words is "one million, six hundred six thousand, nine hundred four".