28875236 has 12 divisors (see below), whose sum is σ = 54418812. Its totient is φ = 13327008.

The previous prime is 28875233. The next prime is 28875239. The reversal of 28875236 is 63257882.

It is an interprime number because it is at equal distance from previous prime (28875233) and next prime (28875239).

It can be written as a sum of positive squares in 2 ways, for example, as 8444836 + 20430400 = 2906^2 + 4520^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28875193 and 28875202.

It is not an unprimeable number, because it can be changed into a prime (28875233) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 277595 + ... + 277698.

It is an arithmetic number, because the mean of its divisors is an integer number (4534901).

Almost surely, 2^28875236 is an apocalyptic number.

28875236 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28875236 is a deficient number, since it is larger than the sum of its proper divisors (25543576).

28875236 is a wasteful number, since it uses less digits than its factorization.

28875236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555310 (or 555308 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 28875236 is about 5373.5682744337. The cubic root of 28875236 is about 306.7904577944.

The spelling of 28875236 in words is "twenty-eight million, eight hundred seventy-five thousand, two hundred thirty-six".