28055616 has 56 divisors (see below), whose sum is σ = 75834240. Its totient is φ = 9149952.

The previous prime is 28055581. The next prime is 28055623. The reversal of 28055616 is 61655082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7470 + ... + 10578.

Almost surely, 2^28055616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28055616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37917120).

28055616 is an abundant number, since it is smaller than the sum of its proper divisors (47778624).

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

28055616 is a wasteful number, since it uses less digits than its factorization.

28055616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3171 (or 3161 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28055616 is about 5296.7552331593. The cubic root of 28055616 is about 303.8598153291.

The spelling of 28055616 in words is "twenty-eight million, fifty-five thousand, six hundred sixteen".