1004040 has 48 divisors (see below), whose sum is σ = 3264300. Its totient is φ = 267648.

The previous prime is 1004033. The next prime is 1004053. The reversal of 1004040 is 404001.

It can be written as a sum of positive squares in 2 ways, for example, as 1004004 + 36 = 1002^2 + 6^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

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, 1035 + ... + 1754.

2^1004040 is an apocalyptic number.

1004040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004040 is an abundant number, since it is smaller than the sum of its proper divisors (2260260).

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

1004040 is a wasteful number, since it uses less digits than its factorization.

1004040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1004040 is about 1002.0179639108. The cubic root of 1004040 is about 100.1344857215.

Adding to 1004040 its reverse (404001), we get a palindrome (1408041).

The spelling of 1004040 in words is "one million, four thousand, forty".