28855371 has 4 divisors (see below), whose sum is σ = 38473832. Its totient is φ = 19236912.

The previous prime is 28855297. The next prime is 28855381. The reversal of 28855371 is 17355882.

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

It is not a de Polignac number, because 28855371 - 2¹⁵ = 28822603 is a prime.

It is a Duffinian 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, 4809226 + ... + 4809231.

It is an arithmetic number, because the mean of its divisors is an integer number (9618458).

Almost surely, 2^28855371 is an apocalyptic number.

28855371 is a deficient number, since it is larger than the sum of its proper divisors (9618461).

28855371 is an equidigital number, since it uses as much as digits as its factorization.

28855371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9618460.

The product of its digits is 67200, while the sum is 39.

The square root of 28855371 is about 5371.7195570878. The cubic root of 28855371 is about 306.7200884931.

It can be divided in two parts, 2885 and 5371, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 28855371 in words is "twenty-eight million, eight hundred fifty-five thousand, three hundred seventy-one".