9139638 has 32 divisors (see below), whose sum is σ = 19105632. Its totient is φ = 2912000.

The previous prime is 9139609. The next prime is 9139639. The reversal of 9139638 is 8369319.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9139596 and 9139605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139639) 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, 12688 + ... + 13388.

It is an arithmetic number, because the mean of its divisors is an integer number (597051).

Almost surely, 2^9139638 is an apocalyptic number.

9139638 is an abundant number, since it is smaller than the sum of its proper divisors (9965994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9139638 is a wasteful number, since it uses less digits than its factorization.

9139638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800.

The product of its digits is 34992, while the sum is 39.

The square root of 9139638 is about 3023.1834214946. The cubic root of 9139638 is about 209.0786392410.

The spelling of 9139638 in words is "nine million, one hundred thirty-nine thousand, six hundred thirty-eight".