28081475 has 12 divisors (see below), whose sum is σ = 35075880. Its totient is φ = 22300800.

The previous prime is 28081457. The next prime is 28081481. The reversal of 28081475 is 57418082.

It is not a de Polignac number, because 28081475 - 2⁸ = 28081219 is a prime.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 566 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (2922990).

Almost surely, 2^28081475 is an apocalyptic number.

28081475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28081475 is a deficient number, since it is larger than the sum of its proper divisors (6994405).

28081475 is a wasteful number, since it uses less digits than its factorization.

28081475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8230 (or 8225 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28081475 is about 5299.1956936879. The cubic root of 28081475 is about 303.9531430262.

The spelling of 28081475 in words is "twenty-eight million, eighty-one thousand, four hundred seventy-five".