28185622 has 8 divisors (see below), whose sum is σ = 43736400. Its totient is φ = 13606824.

The previous prime is 28185617. The next prime is 28185623. The reversal of 28185622 is 22658182.

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 (28185623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242922 + ... + 243037.

It is an arithmetic number, because the mean of its divisors is an integer number (5467050).

Almost surely, 2^28185622 is an apocalyptic number.

28185622 is a deficient number, since it is larger than the sum of its proper divisors (15550778).

28185622 is a wasteful number, since it uses less digits than its factorization.

28185622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485990.

The product of its digits is 15360, while the sum is 34.

The square root of 28185622 is about 5309.0132793204. The cubic root of 28185622 is about 304.3284409049.

The spelling of 28185622 in words is "twenty-eight million, one hundred eighty-five thousand, six hundred twenty-two".