9138824 has 8 divisors (see below), whose sum is σ = 17135310. Its totient is φ = 4569408.

The previous prime is 9138803. The next prime is 9138839. The reversal of 9138824 is 4288319.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 8514724 + 624100 = 2918^2 + 790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 571169 + ... + 571184.

Almost surely, 2^9138824 is an apocalyptic number.

It is an amenable number.

9138824 is a deficient number, since it is larger than the sum of its proper divisors (7996486).

9138824 is a wasteful number, since it uses less digits than its factorization.

9138824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142359 (or 1142355 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 9138824 is about 3023.0487921964. The cubic root of 9138824 is about 209.0724320271.

The spelling of 9138824 in words is "nine million, one hundred thirty-eight thousand, eight hundred twenty-four".