9138550 has 24 divisors (see below), whose sum is σ = 17103816. Its totient is φ = 3632640.

The previous prime is 9138541. The next prime is 9138553. The reversal of 9138550 is 558319.

It is a super-2 number, since 2×9138550² = 167026192205000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9138553) 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 11 ways as a sum of consecutive naturals, for example, 9177 + ... + 10123.

It is an arithmetic number, because the mean of its divisors is an integer number (712659).

Almost surely, 2^9138550 is an apocalyptic number.

9138550 is a deficient number, since it is larger than the sum of its proper divisors (7965266).

9138550 is a wasteful number, since it uses less digits than its factorization.

9138550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1147 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 9138550 is about 3023.0034733688. The cubic root of 9138550 is about 209.0703425380.

The spelling of 9138550 in words is "nine million, one hundred thirty-eight thousand, five hundred fifty".