1004436 has 18 divisors (see below), whose sum is σ = 2539082. Its totient is φ = 334800.

The previous prime is 1004429. The next prime is 1004441. The reversal of 1004436 is 6344001.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 24336 = 990^2 + 156^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13915 + ... + 13986.

2^1004436 is an apocalyptic number.

It is an amenable number.

1004436 is an abundant number, since it is smaller than the sum of its proper divisors (1534646).

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

1004436 is a wasteful number, since it uses less digits than its factorization.

1004436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27911 (or 27906 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1004436 is about 1002.2155456787. The cubic root of 1004436 is about 100.1476485584.

Adding to 1004436 its reverse (6344001), we get a palindrome (7348437).

The spelling of 1004436 in words is "one million, four thousand, four hundred thirty-six".