1138389 has 16 divisors (see below), whose sum is σ = 1751040. Its totient is φ = 644400.

The previous prime is 1138369. The next prime is 1138391. The reversal of 1138389 is 9838311.

It is not a de Polignac number, because 1138389 - 2¹⁷ = 1007317 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2992 + ... + 3350.

It is an arithmetic number, because the mean of its divisors is an integer number (109440).

2^1138389 is an apocalyptic number.

It is an amenable number.

1138389 is a deficient number, since it is larger than the sum of its proper divisors (612651).

1138389 is a wasteful number, since it uses less digits than its factorization.

1138389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520.

The product of its digits is 5184, while the sum is 33.

The square root of 1138389 is about 1066.9531386148. The cubic root of 1138389 is about 104.4151612573.

The spelling of 1138389 in words is "one million, one hundred thirty-eight thousand, three hundred eighty-nine".