1890004 has 12 divisors (see below), whose sum is σ = 3345300. Its totient is φ = 934208.

The previous prime is 1889999. The next prime is 1890019. The reversal of 1890004 is 4000981.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 1768900 = 348^2 + 1330^2 .

It is an Ulam number.

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, 2299 + ... + 3010.

It is an arithmetic number, because the mean of its divisors is an integer number (278775).

2^1890004 is an apocalyptic number.

It is an amenable number.

1890004 is a deficient number, since it is larger than the sum of its proper divisors (1455296).

1890004 is a wasteful number, since it uses less digits than its factorization.

1890004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402 (or 5400 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1890004 is about 1374.7741632719. The cubic root of 1890004 is about 123.6386462172.

Adding to 1890004 its reverse (4000981), we get a palindrome (5890985).

The spelling of 1890004 in words is "one million, eight hundred ninety thousand, four".