28190575 has 24 divisors (see below), whose sum is σ = 40934880. Its totient is φ = 18854400.

The previous prime is 28190557. The next prime is 28190579. The reversal of 28190575 is 57509182.

It is not a de Polignac number, because 28190575 - 2⁵ = 28190543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28190579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5211 + ... + 9139.

It is an arithmetic number, because the mean of its divisors is an integer number (1705620).

Almost surely, 2^28190575 is an apocalyptic number.

28190575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28190575 is a deficient number, since it is larger than the sum of its proper divisors (12744305).

28190575 is a wasteful number, since it uses less digits than its factorization.

28190575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3987 (or 3982 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 28190575 is about 5309.4797296910. The cubic root of 28190575 is about 304.3462661928.

It can be divided in two parts, 28 and 190575, that multiplied together give a square (5336100 = 2310²).

The spelling of 28190575 in words is "twenty-eight million, one hundred ninety thousand, five hundred seventy-five".