1904889 has 8 divisors (see below), whose sum is σ = 2902720. Its totient is φ = 1088496.

The previous prime is 1904879. The next prime is 1904891. The reversal of 1904889 is 9884091.

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

It is not a de Polignac number, because 1904889 - 2⁷ = 1904761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1904809) 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, 45334 + ... + 45375.

It is an arithmetic number, because the mean of its divisors is an integer number (362840).

2^1904889 is an apocalyptic number.

It is an amenable number.

1904889 is a deficient number, since it is larger than the sum of its proper divisors (997831).

1904889 is an equidigital number, since it uses as much as digits as its factorization.

1904889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90719.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1904889 is about 1380.1771625411. The cubic root of 1904889 is about 123.9623758554.

The spelling of 1904889 in words is "one million, nine hundred four thousand, eight hundred eighty-nine".