28055275 has 24 divisors (see below), whose sum is σ = 36122688. Its totient is φ = 21600000.

The previous prime is 28055273. The next prime is 28055299. The reversal of 28055275 is 57255082.

It is not a de Polignac number, because 28055275 - 2¹ = 28055273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28055275.

It is not an unprimeable number, because it can be changed into a prime (28055273) 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, 103390 + ... + 103660.

It is an arithmetic number, because the mean of its divisors is an integer number (1505112).

Almost surely, 2^28055275 is an apocalyptic number.

28055275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28055275 is a deficient number, since it is larger than the sum of its proper divisors (8067413).

28055275 is a wasteful number, since it uses less digits than its factorization.

28055275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 418 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 34.

The square root of 28055275 is about 5296.7230435431. The cubic root of 28055275 is about 303.8585842432.

It can be divided in two parts, 280 and 55275, that added together give a palindrome (55555).

The spelling of 28055275 in words is "twenty-eight million, fifty-five thousand, two hundred seventy-five".