28175422 has 16 divisors (see below), whose sum is σ = 46188144. Its totient is φ = 12784000.

The previous prime is 28175417. The next prime is 28175447. The reversal of 28175422 is 22457182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20022 + ... + 21382.

It is an arithmetic number, because the mean of its divisors is an integer number (2886759).

Almost surely, 2^28175422 is an apocalyptic number.

28175422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28175422 is a deficient number, since it is larger than the sum of its proper divisors (18012722).

28175422 is a wasteful number, since it uses less digits than its factorization.

28175422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315.

The product of its digits is 8960, while the sum is 31.

The square root of 28175422 is about 5308.0525619101. The cubic root of 28175422 is about 304.2917256768.

The spelling of 28175422 in words is "twenty-eight million, one hundred seventy-five thousand, four hundred twenty-two".