28086912 has 224 divisors, whose sum is σ = 98107680. Its totient is φ = 7838208.

The previous prime is 28086911. The next prime is 28086913. The reversal of 28086912 is 21968082.

It is an interprime number because it is at equal distance from previous prime (28086911) and next prime (28086913).

It is a tau number, because it is divible by the number of its divisors (224).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28086911) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 653163 + ... + 653205.

Almost surely, 2^28086912 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 28086912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49053840).

28086912 is an abundant number, since it is smaller than the sum of its proper divisors (70020768).

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

28086912 is an frugal number, since it uses more digits than its factorization.

28086912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28086912 is about 5299.7086712384. The cubic root of 28086912 is about 303.9727584084.

The spelling of 28086912 in words is "twenty-eight million, eighty-six thousand, nine hundred twelve".