28055622 has 16 divisors (see below), whose sum is σ = 64127232. Its totient is φ = 8015880.

The previous prime is 28055581. The next prime is 28055623. The reversal of 28055622 is 22655082.

It is a self number, because there is not a number n which added to its sum of digits gives 28055622.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055623) 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, 333954 + ... + 334037.

It is an arithmetic number, because the mean of its divisors is an integer number (4007952).

Almost surely, 2^28055622 is an apocalyptic number.

28055622 is an abundant number, since it is smaller than the sum of its proper divisors (36071610).

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

28055622 is a wasteful number, since it uses less digits than its factorization.

28055622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668003.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 28055622 is about 5296.7557995437. The cubic root of 28055622 is about 303.8598369904.

The spelling of 28055622 in words is "twenty-eight million, fifty-five thousand, six hundred twenty-two".