28805075 has 24 divisors (see below), whose sum is σ = 38726688. Its totient is φ = 21127680.

The previous prime is 28805071. The next prime is 28805093. The reversal of 28805075 is 57050882.

It is not a de Polignac number, because 28805075 - 2² = 28805071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28805071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85307 + ... + 85643.

It is an arithmetic number, because the mean of its divisors is an integer number (1613612).

Almost surely, 2^28805075 is an apocalyptic number.

28805075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28805075 is a deficient number, since it is larger than the sum of its proper divisors (9921613).

28805075 is a wasteful number, since it uses less digits than its factorization.

28805075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 623 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 28805075 is about 5367.0359603789. The cubic root of 28805075 is about 306.5417766239.

The spelling of 28805075 in words is "twenty-eight million, eight hundred five thousand, seventy-five".