28855311 has 4 divisors (see below), whose sum is σ = 38473752. Its totient is φ = 19236872.

The previous prime is 28855297. The next prime is 28855381. The reversal of 28855311 is 11355882.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28855311 - 2⁶ = 28855247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28855381) 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, 4809216 + ... + 4809221.

It is an arithmetic number, because the mean of its divisors is an integer number (9618438).

Almost surely, 2^28855311 is an apocalyptic number.

28855311 is a deficient number, since it is larger than the sum of its proper divisors (9618441).

28855311 is an equidigital number, since it uses as much as digits as its factorization.

28855311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9618440.

The product of its digits is 9600, while the sum is 33.

The square root of 28855311 is about 5371.7139722811. The cubic root of 28855311 is about 306.7198759016.

The spelling of 28855311 in words is "twenty-eight million, eight hundred fifty-five thousand, three hundred eleven".