1138438 has 16 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 484416.

The previous prime is 1138433. The next prime is 1138441. The reversal of 1138438 is 8348311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3088 + ... + 3436.

It is an arithmetic number, because the mean of its divisors is an integer number (122850).

2^1138438 is an apocalyptic number.

1138438 is a deficient number, since it is larger than the sum of its proper divisors (827162).

1138438 is a wasteful number, since it uses less digits than its factorization.

1138438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591.

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

The square root of 1138438 is about 1066.9761009507. The cubic root of 1138438 is about 104.4166593596.

The spelling of 1138438 in words is "one million, one hundred thirty-eight thousand, four hundred thirty-eight".