1004390 has 16 divisors (see below), whose sum is σ = 1847232. Its totient is φ = 393024.

The previous prime is 1004371. The next prime is 1004401. The reversal of 1004390 is 934001.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (115452).

2^1004390 is an apocalyptic number.

1004390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1004390 is a deficient number, since it is larger than the sum of its proper divisors (842842).

1004390 is a wasteful number, since it uses less digits than its factorization.

1004390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2191.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1004390 is about 1002.1925962608. The cubic root of 1004390 is about 100.1461197196.

Adding to 1004390 its reverse (934001), we get a palindrome (1938391).

The spelling of 1004390 in words is "one million, four thousand, three hundred ninety".