9131238 has 16 divisors (see below), whose sum is σ = 20291760. Its totient is φ = 3043728.

The previous prime is 9131237. The next prime is 9131263. The reversal of 9131238 is 8321319.

9131238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (9131231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84495 + ... + 84602.

It is an arithmetic number, because the mean of its divisors is an integer number (1268235).

Almost surely, 2^9131238 is an apocalyptic number.

9131238 is an abundant number, since it is smaller than the sum of its proper divisors (11160522).

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

9131238 is a wasteful number, since it uses less digits than its factorization.

9131238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169108 (or 169102 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 9131238 is about 3021.7938381035. The cubic root of 9131238 is about 209.0145667220.

It can be divided in two parts, 91 and 31238, that added together give a square (31329 = 177²).

The spelling of 9131238 in words is "nine million, one hundred thirty-one thousand, two hundred thirty-eight".