28055886 has 16 divisors (see below), whose sum is σ = 56457984. Its totient is φ = 9294264.

The previous prime is 28055873. The next prime is 28055887. The reversal of 28055886 is 68855082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13366 + ... + 15321.

It is an arithmetic number, because the mean of its divisors is an integer number (3528624).

Almost surely, 2^28055886 is an apocalyptic number.

28055886 is an abundant number, since it is smaller than the sum of its proper divisors (28402098).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28055886 is a wasteful number, since it uses less digits than its factorization.

28055886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28855.

The product of its (nonzero) digits is 153600, while the sum is 42.

The square root of 28055886 is about 5296.7807203999. The cubic root of 28055886 is about 303.8607900821.

The spelling of 28055886 in words is "twenty-eight million, fifty-five thousand, eight hundred eighty-six".