28310886 has 24 divisors (see below), whose sum is σ = 61439040. Its totient is φ = 9421776.

The previous prime is 28310881. The next prime is 28310903. The reversal of 28310886 is 68801382.

It is a super-2 number, since 2×28310886² = 1603012532209992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28310886.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28310881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18955 + ... + 20393.

It is an arithmetic number, because the mean of its divisors is an integer number (2559960).

Almost surely, 2^28310886 is an apocalyptic number.

28310886 is an abundant number, since it is smaller than the sum of its proper divisors (33128154).

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

28310886 is a wasteful number, since it uses less digits than its factorization.

28310886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540 (or 2537 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 28310886 is about 5320.7974966165. The cubic root of 28310886 is about 304.7786120731.

The spelling of 28310886 in words is "twenty-eight million, three hundred ten thousand, eight hundred eighty-six".