28700255 has 16 divisors (see below), whose sum is σ = 35251200. Its totient is φ = 22425120.

The previous prime is 28700249. The next prime is 28700257. The reversal of 28700255 is 55200782.

It is a de Polignac number, because none of the positive numbers 2^k-28700255 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79766 + ... + 80124.

It is an arithmetic number, because the mean of its divisors is an integer number (2203200).

Almost surely, 2^28700255 is an apocalyptic number.

28700255 is a deficient number, since it is larger than the sum of its proper divisors (6550945).

28700255 is a wasteful number, since it uses less digits than its factorization.

28700255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 28700255 is about 5357.2618939156. The cubic root of 28700255 is about 306.1694954298.

The spelling of 28700255 in words is "twenty-eight million, seven hundred thousand, two hundred fifty-five".