1904406 has 16 divisors (see below), whose sum is σ = 4353024. Its totient is φ = 544104.

The previous prime is 1904311. The next prime is 1904407. The reversal of 1904406 is 6044091.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1904407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22630 + ... + 22713.

It is an arithmetic number, because the mean of its divisors is an integer number (272064).

2^1904406 is an apocalyptic number.

1904406 is an abundant number, since it is smaller than the sum of its proper divisors (2448618).

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

1904406 is a wasteful number, since it uses less digits than its factorization.

1904406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45355.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1904406 is about 1380.0021739113. The cubic root of 1904406 is about 123.9518977490.

Adding to 1904406 its reverse (6044091), we get a palindrome (7948497).

The spelling of 1904406 in words is "one million, nine hundred four thousand, four hundred six".