28766835 has 12 divisors (see below), whose sum is σ = 49862592. Its totient is φ = 15342288.

The previous prime is 28766833. The next prime is 28766909. The reversal of 28766835 is 53866782.

It is not a de Polignac number, because 28766835 - 2¹ = 28766833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 639263 = 28766835 / (2 + 8 + 7 + 6 + 6 + 8 + 3 + 5).

It is not an unprimeable number, because it can be changed into a prime (28766831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 319587 + ... + 319676.

It is an arithmetic number, because the mean of its divisors is an integer number (4155216).

Almost surely, 2^28766835 is an apocalyptic number.

28766835 is a deficient number, since it is larger than the sum of its proper divisors (21095757).

28766835 is a wasteful number, since it uses less digits than its factorization.

28766835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639274 (or 639271 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 28766835 is about 5363.4722894782. The cubic root of 28766835 is about 306.4060673366.

The spelling of 28766835 in words is "twenty-eight million, seven hundred sixty-six thousand, eight hundred thirty-five".