28086516 has 36 divisors (see below), whose sum is σ = 75174372. Its totient is φ = 8811264.

The previous prime is 28086493. The next prime is 28086523. The reversal of 28086516 is 61568082.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13616100 + 14470416 = 3690^2 + 3804^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 22335 + ... + 23558.

It is an arithmetic number, because the mean of its divisors is an integer number (2088177).

Almost surely, 2^28086516 is an apocalyptic number.

It is an amenable number.

28086516 is an abundant number, since it is smaller than the sum of its proper divisors (47087856).

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

28086516 is a wasteful number, since it uses less digits than its factorization.

28086516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45920 (or 45915 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28086516 is about 5299.6713105626. The cubic root of 28086516 is about 303.9713298216.

The spelling of 28086516 in words is "twenty-eight million, eighty-six thousand, five hundred sixteen".