2004390 has 24 divisors (see below), whose sum is σ = 5211648. Its totient is φ = 534480.

The previous prime is 2004383. The next prime is 2004421. The reversal of 2004390 is 934002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11046 + ... + 11225.

It is an arithmetic number, because the mean of its divisors is an integer number (217152).

2^2004390 is an apocalyptic number.

2004390 is an abundant number, since it is smaller than the sum of its proper divisors (3207258).

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

2004390 is a wasteful number, since it uses less digits than its factorization.

2004390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22284 (or 22281 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 2004390 is about 1415.7648109767. The cubic root of 2004390 is about 126.0842218470.

Adding to 2004390 its reverse (934002), we get a palindrome (2938392).

The spelling of 2004390 in words is "two million, four thousand, three hundred ninety".