8172238 has 4 divisors (see below), whose sum is σ = 12258360. Its totient is φ = 4086118.

The previous prime is 8172233. The next prime is 8172253. The reversal of 8172238 is 8322718.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8172233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2043058 + ... + 2043061.

It is an arithmetic number, because the mean of its divisors is an integer number (3064590).

Almost surely, 2^8172238 is an apocalyptic number.

8172238 is a deficient number, since it is larger than the sum of its proper divisors (4086122).

8172238 is a wasteful number, since it uses less digits than its factorization.

8172238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086121.

The product of its digits is 5376, while the sum is 31.

The square root of 8172238 is about 2858.7126473292. The cubic root of 8172238 is about 201.4251374621.

The spelling of 8172238 in words is "eight million, one hundred seventy-two thousand, two hundred thirty-eight".