1438388 has 24 divisors (see below), whose sum is σ = 2940672. Its totient is φ = 602784.

The previous prime is 1438379. The next prime is 1438399. The reversal of 1438388 is 8838341.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 770 + ... + 1862.

It is an arithmetic number, because the mean of its divisors is an integer number (122528).

2^1438388 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 1438388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1470336).

1438388 is an abundant number, since it is smaller than the sum of its proper divisors (1502284).

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

1438388 is a wasteful number, since it uses less digits than its factorization.

1438388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1149 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 1438388 is about 1199.3281452547. The cubic root of 1438388 is about 112.8821702302.

The spelling of 1438388 in words is "one million, four hundred thirty-eight thousand, three hundred eighty-eight".