28752775 has 12 divisors (see below), whose sum is σ = 36883800. Its totient is φ = 22208480.

The previous prime is 28752769. The next prime is 28752793. The reversal of 28752775 is 57725782.

It is not a de Polignac number, because 28752775 - 2⁵ = 28752743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19105 + ... + 20554.

It is an arithmetic number, because the mean of its divisors is an integer number (3073650).

Almost surely, 2^28752775 is an apocalyptic number.

28752775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28752775 is a deficient number, since it is larger than the sum of its proper divisors (8131025).

28752775 is a wasteful number, since it uses less digits than its factorization.

28752775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39698 (or 39693 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 28752775 is about 5362.1614112222. The cubic root of 28752775 is about 306.3561398030.

The spelling of 28752775 in words is "twenty-eight million, seven hundred fifty-two thousand, seven hundred seventy-five".