28238164 has 12 divisors (see below), whose sum is σ = 50468544. Its totient is φ = 13818584.

The previous prime is 28238129. The next prime is 28238183. The reversal of 28238164 is 46183282.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 74914 + ... + 75289.

It is an arithmetic number, because the mean of its divisors is an integer number (4205712).

Almost surely, 2^28238164 is an apocalyptic number.

It is an amenable number.

28238164 is a deficient number, since it is larger than the sum of its proper divisors (22230380).

28238164 is a wasteful number, since it uses less digits than its factorization.

28238164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150254 (or 150252 counting only the distinct ones).

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

The square root of 28238164 is about 5313.9593524979. The cubic root of 28238164 is about 304.5174273241.

The spelling of 28238164 in words is "twenty-eight million, two hundred thirty-eight thousand, one hundred sixty-four".