9138408 has 64 divisors (see below), whose sum is σ = 24131520. Its totient is φ = 2880000.

The previous prime is 9138347. The next prime is 9138413. The reversal of 9138408 is 8048319.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36283 + ... + 36533.

It is an arithmetic number, because the mean of its divisors is an integer number (377055).

Almost surely, 2^9138408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9138408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12065760).

9138408 is an abundant number, since it is smaller than the sum of its proper divisors (14993112).

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

9138408 is a wasteful number, since it uses less digits than its factorization.

9138408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 9138408 is about 3022.9799867019. The cubic root of 9138408 is about 209.0692596477.

The spelling of 9138408 in words is "nine million, one hundred thirty-eight thousand, four hundred eight".