28192775 has 24 divisors (see below), whose sum is σ = 37914240. Its totient is φ = 20672640.

The previous prime is 28192763. The next prime is 28192777. The reversal of 28192775 is 57729182.

It is not a de Polignac number, because 28192775 - 2⁸ = 28192519 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

Its product of digits (70560) is a multiple of the sum of its prime divisors (630).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28192777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72281 + ... + 72669.

It is an arithmetic number, because the mean of its divisors is an integer number (1579760).

Almost surely, 2^28192775 is an apocalyptic number.

28192775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28192775 is a deficient number, since it is larger than the sum of its proper divisors (9721465).

28192775 is a wasteful number, since it uses less digits than its factorization.

28192775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635 (or 630 counting only the distinct ones).

The product of its digits is 70560, while the sum is 41.

The square root of 28192775 is about 5309.6869022570. The cubic root of 28192775 is about 304.3541830748.

The spelling of 28192775 in words is "twenty-eight million, one hundred ninety-two thousand, seven hundred seventy-five".