28555275 has 48 divisors (see below), whose sum is σ = 54560000. Its totient is φ = 12908160.

The previous prime is 28555253. The next prime is 28555301. The reversal of 28555275 is 57255582.

It is not a de Polignac number, because 28555275 - 2⁵ = 28555243 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 47 ways as a sum of consecutive naturals, for example, 56976 + ... + 57474.

Almost surely, 2^28555275 is an apocalyptic number.

28555275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28555275 is a deficient number, since it is larger than the sum of its proper divisors (26004725).

28555275 is a wasteful number, since it uses less digits than its factorization.

28555275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 623 counting only the distinct ones).

The product of its digits is 140000, while the sum is 39.

The square root of 28555275 is about 5343.7135963672. The cubic root of 28555275 is about 305.6530841410.

The spelling of 28555275 in words is "twenty-eight million, five hundred fifty-five thousand, two hundred seventy-five".