28086678 has 12 divisors (see below), whose sum is σ = 60854508. Its totient is φ = 9362220.

The previous prime is 28086671. The next prime is 28086679. The reversal of 28086678 is 87668082.

It is a super-2 number, since 2×28086678² = 1577722962151368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28086671) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 780168 + ... + 780203.

It is an arithmetic number, because the mean of its divisors is an integer number (5071209).

Almost surely, 2^28086678 is an apocalyptic number.

28086678 is an abundant number, since it is smaller than the sum of its proper divisors (32767830).

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

28086678 is a wasteful number, since it uses less digits than its factorization.

28086678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560379 (or 1560376 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 28086678 is about 5299.6865945073. The cubic root of 28086678 is about 303.9719142451.

The spelling of 28086678 in words is "twenty-eight million, eighty-six thousand, six hundred seventy-eight".