1438138 has 8 divisors (see below), whose sum is σ = 2323188. Its totient is φ = 663744.

The previous prime is 1438123. The next prime is 1438159. The reversal of 1438138 is 8318341.

It can be written as a sum of positive squares in 2 ways, for example, as 1432809 + 5329 = 1197^2 + 73^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×1438138³ = 8923247524723332216, which contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27631 + ... + 27682.

2^1438138 is an apocalyptic number.

1438138 is a deficient number, since it is larger than the sum of its proper divisors (885050).

1438138 is a wasteful number, since it uses less digits than its factorization.

1438138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55328.

The product of its digits is 2304, while the sum is 28.

The square root of 1438138 is about 1199.2239157055. The cubic root of 1438138 is about 112.8756299973.

It can be divided in two parts, 143 and 8138, that added together give a square (8281 = 91²).

The spelling of 1438138 in words is "one million, four hundred thirty-eight thousand, one hundred thirty-eight".