28086552 has 96 divisors (see below), whose sum is σ = 84236880. Its totient is φ = 8398080.

The previous prime is 28086547. The next prime is 28086571. The reversal of 28086552 is 25568082.

28086552 is a `hidden beast` number, since 28 + 0 + 86 + 552 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34227 + ... + 35037.

Almost surely, 2^28086552 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 28086552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42118440).

28086552 is an abundant number, since it is smaller than the sum of its proper divisors (56150328).

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

28086552 is a wasteful number, since it uses less digits than its factorization.

28086552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 866 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28086552 is about 5299.6747069985. The cubic root of 28086552 is about 303.9714596937.

The spelling of 28086552 in words is "twenty-eight million, eighty-six thousand, five hundred fifty-two".