28173422 has 8 divisors (see below), whose sum is σ = 43057656. Its totient is φ = 13820872.

The previous prime is 28173407. The next prime is 28173427. The reversal of 28173422 is 22437182.

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 (28173427) 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, 132788 + ... + 132999.

It is an arithmetic number, because the mean of its divisors is an integer number (5382207).

Almost surely, 2^28173422 is an apocalyptic number.

28173422 is a deficient number, since it is larger than the sum of its proper divisors (14884234).

28173422 is a wasteful number, since it uses less digits than its factorization.

28173422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265842.

The product of its digits is 5376, while the sum is 29.

The square root of 28173422 is about 5307.8641655566. The cubic root of 28173422 is about 304.2845255734.

The spelling of 28173422 in words is "twenty-eight million, one hundred seventy-three thousand, four hundred twenty-two".