28775045 has 16 divisors (see below), whose sum is σ = 37981440. Its totient is φ = 20794944.

The previous prime is 28775027. The next prime is 28775053. The reversal of 28775045 is 54057782.

It is a cyclic number.

It is not a de Polignac number, because 28775045 - 2¹⁴ = 28758661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1655 + ... + 7764.

It is an arithmetic number, because the mean of its divisors is an integer number (2373840).

Almost surely, 2^28775045 is an apocalyptic number.

It is an amenable number.

28775045 is a deficient number, since it is larger than the sum of its proper divisors (9206395).

28775045 is a wasteful number, since it uses less digits than its factorization.

28775045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9484.

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 28775045 is about 5364.2375972733. The cubic root of 28775045 is about 306.4352138003.

The spelling of 28775045 in words is "twenty-eight million, seven hundred seventy-five thousand, forty-five".