28396855 has 4 divisors (see below), whose sum is σ = 34076232. Its totient is φ = 22717480.

The previous prime is 28396853. The next prime is 28396859. The reversal of 28396855 is 55869382.

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

It is not a de Polignac number, because 28396855 - 2¹ = 28396853 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 (28396853) 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, 2839681 + ... + 2839690.

It is an arithmetic number, because the mean of its divisors is an integer number (8519058).

Almost surely, 2^28396855 is an apocalyptic number.

28396855 is a deficient number, since it is larger than the sum of its proper divisors (5679377).

28396855 is an equidigital number, since it uses as much as digits as its factorization.

28396855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5679376.

The product of its digits is 518400, while the sum is 46.

The square root of 28396855 is about 5328.8699552532. The cubic root of 28396855 is about 305.0867978352.

The spelling of 28396855 in words is "twenty-eight million, three hundred ninety-six thousand, eight hundred fifty-five".