28501255 has 16 divisors (see below), whose sum is σ = 35965440. Its totient is φ = 21640608.

The previous prime is 28501241. The next prime is 28501327. The reversal of 28501255 is 55210582.

It is not a de Polignac number, because 28501255 - 2⁷ = 28501127 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15094 + ... + 16876.

It is an arithmetic number, because the mean of its divisors is an integer number (2247840).

Almost surely, 2^28501255 is an apocalyptic number.

28501255 is a deficient number, since it is larger than the sum of its proper divisors (7464185).

28501255 is a wasteful number, since it uses less digits than its factorization.

28501255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 28501255 is about 5338.6566662410. The cubic root of 28501255 is about 305.4602207387.

It can be divided in two parts, 2850125 and 5, that multiplied together give a square (14250625 = 3775²).

The spelling of 28501255 in words is "twenty-eight million, five hundred one thousand, two hundred fifty-five".