28267855 has 48 divisors (see below), whose sum is σ = 45652896. Its totient is φ = 16558080.

The previous prime is 28267843. The next prime is 28267861. The reversal of 28267855 is 55876282.

It is not a de Polignac number, because 28267855 - 2¹⁵ = 28235087 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45507 + ... + 46123.

It is an arithmetic number, because the mean of its divisors is an integer number (951102).

Almost surely, 2^28267855 is an apocalyptic number.

28267855 is a deficient number, since it is larger than the sum of its proper divisors (17385041).

28267855 is a wasteful number, since it uses less digits than its factorization.

28267855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664 (or 657 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 28267855 is about 5316.7522981610. The cubic root of 28267855 is about 304.6241181595.

The spelling of 28267855 in words is "twenty-eight million, two hundred sixty-seven thousand, eight hundred fifty-five".