28766527 has 4 divisors (see below), whose sum is σ = 29435560. Its totient is φ = 28097496.

The previous prime is 28766519. The next prime is 28766539. The reversal of 28766527 is 72566782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72566782 = 2 ⋅36283391.

It is a cyclic number.

It is not a de Polignac number, because 28766527 - 2³ = 28766519 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 668989 = 28766527 / (2 + 8 + 7 + 6 + 6 + 5 + 2 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28766587) 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, 334452 + ... + 334537.

It is an arithmetic number, because the mean of its divisors is an integer number (7358890).

Almost surely, 2^28766527 is an apocalyptic number.

28766527 is a deficient number, since it is larger than the sum of its proper divisors (669033).

28766527 is an equidigital number, since it uses as much as digits as its factorization.

28766527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669032.

The product of its digits is 282240, while the sum is 43.

The square root of 28766527 is about 5363.4435766586. The cubic root of 28766527 is about 306.4049737926.

The spelling of 28766527 in words is "twenty-eight million, seven hundred sixty-six thousand, five hundred twenty-seven".