9138204 has 48 divisors (see below), whose sum is σ = 23869440. Its totient is φ = 3023280.

The previous prime is 9138193. The next prime is 9138209. The reversal of 9138204 is 4028319.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138209) 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, 20407 + ... + 20849.

It is an arithmetic number, because the mean of its divisors is an integer number (497280).

Almost surely, 2^9138204 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 9138204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11934720).

9138204 is an abundant number, since it is smaller than the sum of its proper divisors (14731236).

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

9138204 is a wasteful number, since it uses less digits than its factorization.

9138204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 9138204 is about 3022.9462449736. The cubic root of 9138204 is about 209.0677039264.

The spelling of 9138204 in words is "nine million, one hundred thirty-eight thousand, two hundred four".