28164238 has 8 divisors (see below), whose sum is σ = 42423840. Its totient is φ = 14022960.

The previous prime is 28164221. The next prime is 28164239. The reversal of 28164238 is 83246182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28164239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28983 + ... + 29938.

It is an arithmetic number, because the mean of its divisors is an integer number (5302980).

Almost surely, 2^28164238 is an apocalyptic number.

28164238 is a deficient number, since it is larger than the sum of its proper divisors (14259602).

28164238 is a wasteful number, since it uses less digits than its factorization.

28164238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59162.

The product of its digits is 18432, while the sum is 34.

The square root of 28164238 is about 5306.9989636328. The cubic root of 28164238 is about 304.2514583231.

The spelling of 28164238 in words is "twenty-eight million, one hundred sixty-four thousand, two hundred thirty-eight".