938390639 has 16 divisors (see below), whose sum is σ = 1035713280. Its totient is φ = 846236160.

The previous prime is 938390611. The next prime is 938390647. The reversal of 938390639 is 936093839.

It is a cyclic number.

It is not a de Polignac number, because 938390639 - 2¹² = 938386543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (938390659) 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, 87119 + ... + 97295.

It is an arithmetic number, because the mean of its divisors is an integer number (64732080).

Almost surely, 2^938390639 is an apocalyptic number.

938390639 is a deficient number, since it is larger than the sum of its proper divisors (97322641).

938390639 is a wasteful number, since it uses less digits than its factorization.

938390639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10430.

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 938390639 is about 30633.1624061245. The cubic root of 938390639 is about 979.0267440908.

The spelling of 938390639 in words is "nine hundred thirty-eight million, three hundred ninety thousand, six hundred thirty-nine".