28142475 has 12 divisors (see below), whose sum is σ = 46529016. Its totient is φ = 15009280.

The previous prime is 28142467. The next prime is 28142503. The reversal of 28142475 is 57424182.

It is not a de Polignac number, because 28142475 - 2³ = 28142467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187542 + ... + 187691.

It is an arithmetic number, because the mean of its divisors is an integer number (3877418).

Almost surely, 2^28142475 is an apocalyptic number.

28142475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28142475 is a deficient number, since it is larger than the sum of its proper divisors (18386541).

28142475 is a wasteful number, since it uses less digits than its factorization.

28142475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375246 (or 375241 counting only the distinct ones).

The product of its digits is 17920, while the sum is 33.

The square root of 28142475 is about 5304.9481618579. The cubic root of 28142475 is about 304.1730713190.

The spelling of 28142475 in words is "twenty-eight million, one hundred forty-two thousand, four hundred seventy-five".