28754287 has 4 divisors (see below), whose sum is σ = 28790640. Its totient is φ = 28717936.

The previous prime is 28754281. The next prime is 28754333. The reversal of 28754287 is 78245782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78245782 = 2 ⋅39122891.

It is a cyclic number.

It is not a de Polignac number, because 28754287 - 2³ = 28754279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28754281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16963 + ... + 18580.

It is an arithmetic number, because the mean of its divisors is an integer number (7197660).

Almost surely, 2^28754287 is an apocalyptic number.

28754287 is a deficient number, since it is larger than the sum of its proper divisors (36353).

28754287 is an equidigital number, since it uses as much as digits as its factorization.

28754287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36352.

The product of its digits is 250880, while the sum is 43.

The square root of 28754287 is about 5362.3023972917. The cubic root of 28754287 is about 306.3615097469.

The spelling of 28754287 in words is "twenty-eight million, seven hundred fifty-four thousand, two hundred eighty-seven".