28105075 has 6 divisors (see below), whose sum is σ = 34850324. Its totient is φ = 22484040.

The previous prime is 28105069. The next prime is 28105087. The reversal of 28105075 is 57050182.

It is not a de Polignac number, because 28105075 - 2²¹ = 26007923 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 562077 + ... + 562126.

Almost surely, 2^28105075 is an apocalyptic number.

28105075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28105075 is a deficient number, since it is larger than the sum of its proper divisors (6745249).

28105075 is a wasteful number, since it uses less digits than its factorization.

28105075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1124213 (or 1124208 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 28105075 is about 5301.4219790543. The cubic root of 28105075 is about 304.0382677761.

The spelling of 28105075 in words is "twenty-eight million, one hundred five thousand, seventy-five".