1138633389 has 16 divisors (see below), whose sum is σ = 1715457600. Its totient is φ = 746221968.

The previous prime is 1138633369. The next prime is 1138633411. The reversal of 1138633389 is 9833368311.

1138633389 is a `hidden beast` number, since 1 + 1 + 3 + 8 + 633 + 3 + 8 + 9 = 666.

It is not a de Polignac number, because 1138633389 - 2¹¹ = 1138631341 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138633369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355794 + ... + 358979.

It is an arithmetic number, because the mean of its divisors is an integer number (107216100).

Almost surely, 2^1138633389 is an apocalyptic number.

It is an amenable number.

1138633389 is a deficient number, since it is larger than the sum of its proper divisors (576824211).

1138633389 is an equidigital number, since it uses as much as digits as its factorization.

1138633389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714841 (or 714835 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 1138633389 is about 33743.6422011614. The cubic root of 1138633389 is about 1044.2263266087.

The spelling of 1138633389 in words is "one billion, one hundred thirty-eight million, six hundred thirty-three thousand, three hundred eighty-nine".