28752761 has 4 divisors (see below), whose sum is σ = 29116800. Its totient is φ = 28388724.

The previous prime is 28752751. The next prime is 28752769. The reversal of 28752761 is 16725782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28752761 - 2¹⁸ = 28490617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28752769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181901 + ... + 182058.

It is an arithmetic number, because the mean of its divisors is an integer number (7279200).

Almost surely, 2^28752761 is an apocalyptic number.

It is an amenable number.

28752761 is a deficient number, since it is larger than the sum of its proper divisors (364039).

28752761 is an equidigital number, since it uses as much as digits as its factorization.

28752761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364038.

The product of its digits is 47040, while the sum is 38.

The square root of 28752761 is about 5362.1601057783. The cubic root of 28752761 is about 306.3560900804.

The spelling of 28752761 in words is "twenty-eight million, seven hundred fifty-two thousand, seven hundred sixty-one".