28555255 has 4 divisors (see below), whose sum is σ = 34266312. Its totient is φ = 22844200.

The previous prime is 28555253. The next prime is 28555301. The reversal of 28555255 is 55255582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55255582 = 2 ⋅27627791.

It is not a de Polignac number, because 28555255 - 2¹ = 28555253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2855521 + ... + 2855530.

It is an arithmetic number, because the mean of its divisors is an integer number (8566578).

Almost surely, 2^28555255 is an apocalyptic number.

28555255 is a deficient number, since it is larger than the sum of its proper divisors (5711057).

28555255 is an equidigital number, since it uses as much as digits as its factorization.

28555255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5711056.

The product of its digits is 100000, while the sum is 37.

The square root of 28555255 is about 5343.7117250091. The cubic root of 28555255 is about 305.6530127816.

The spelling of 28555255 in words is "twenty-eight million, five hundred fifty-five thousand, two hundred fifty-five".