28756255 has 32 divisors (see below), whose sum is σ = 39528000. Its totient is φ = 20056960.

The previous prime is 28756243. The next prime is 28756267. The reversal of 28756255 is 55265782.

28756255 = T₂₅₅ + T₂₅₆ + ... + T₅₇₃.

It is an interprime number because it is at equal distance from previous prime (28756243) and next prime (28756267).

It is not a de Polignac number, because 28756255 - 2⁵ = 28756223 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192921 + ... + 193069.

It is an arithmetic number, because the mean of its divisors is an integer number (1235250).

Almost surely, 2^28756255 is an apocalyptic number.

28756255 is a deficient number, since it is larger than the sum of its proper divisors (10771745).

28756255 is a wasteful number, since it uses less digits than its factorization.

28756255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 194 counting only the distinct ones).

The product of its digits is 168000, while the sum is 40.

The square root of 28756255 is about 5362.4858974174. The cubic root of 28756255 is about 306.3684989157.

The spelling of 28756255 in words is "twenty-eight million, seven hundred fifty-six thousand, two hundred fifty-five".