1004388 has 48 divisors (see below), whose sum is σ = 2924544. Its totient is φ = 260640.

The previous prime is 1004371. The next prime is 1004401. The reversal of 1004388 is 8834001.

It is an Ulam number.

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 15 ways as a sum of consecutive naturals, for example, 381 + ... + 1467.

It is an arithmetic number, because the mean of its divisors is an integer number (60928).

2^1004388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1004388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462272).

1004388 is an abundant number, since it is smaller than the sum of its proper divisors (1920156).

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

1004388 is a wasteful number, since it uses less digits than its factorization.

1004388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 1004388 is about 1002.1915984481. The cubic root of 1004388 is about 100.1460532473.

Adding to 1004388 its reverse (8834001), we get a palindrome (9838389).

The spelling of 1004388 in words is "one million, four thousand, three hundred eighty-eight".