1906604 has 24 divisors (see below), whose sum is σ = 3847200. Its totient is φ = 809856.

The previous prime is 1906603. The next prime is 1906607. The reversal of 1906604 is 4066091.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1906603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3944 + ... + 4400.

It is an arithmetic number, because the mean of its divisors is an integer number (160300).

2^1906604 is an apocalyptic number.

1906604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1906604 is an abundant number, since it is smaller than the sum of its proper divisors (1940596).

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

1906604 is a wasteful number, since it uses less digits than its factorization.

1906604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617 (or 615 counting only the distinct ones).

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

The square root of 1906604 is about 1380.7983198136. The cubic root of 1906604 is about 123.9995664223. Note that the first 3 decimals are identical.

The spelling of 1906604 in words is "one million, nine hundred six thousand, six hundred four".