1438404 has 48 divisors (see below), whose sum is σ = 3882816. Its totient is φ = 409600.

The previous prime is 1438399. The next prime is 1438417. The reversal of 1438404 is 4048341.

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, 1924 + ... + 2564.

It is an arithmetic number, because the mean of its divisors is an integer number (80892).

2^1438404 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 1438404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1941408).

1438404 is an abundant number, since it is smaller than the sum of its proper divisors (2444412).

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

1438404 is a wasteful number, since it uses less digits than its factorization.

1438404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 1438404 is about 1199.3348156374. The cubic root of 1438404 is about 112.8825887793.

The spelling of 1438404 in words is "one million, four hundred thirty-eight thousand, four hundred four".