9138924 has 72 divisors (see below), whose sum is σ = 25159680. Its totient is φ = 2786400.

The previous prime is 9138917. The next prime is 9138929. The reversal of 9138924 is 4298319.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (15552) is a multiple of the sum of its prime divisors (486).

It is not an unprimeable number, because it can be changed into a prime (9138929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20989 + ... + 21419.

It is an arithmetic number, because the mean of its divisors is an integer number (349440).

Almost surely, 2^9138924 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 9138924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12579840).

9138924 is an abundant number, since it is smaller than the sum of its proper divisors (16020756).

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

9138924 is a wasteful number, since it uses less digits than its factorization.

9138924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 486 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 9138924 is about 3023.0653317452. The cubic root of 9138924 is about 209.0731946040.

The spelling of 9138924 in words is "nine million, one hundred thirty-eight thousand, nine hundred twenty-four".