28087886 has 8 divisors (see below), whose sum is σ = 42154464. Its totient is φ = 14036400.

The previous prime is 28087879. The next prime is 28087907. The reversal of 28087886 is 68878082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28087886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4586 + ... + 8786.

It is an arithmetic number, because the mean of its divisors is an integer number (5269308).

Almost surely, 2^28087886 is an apocalyptic number.

28087886 is a deficient number, since it is larger than the sum of its proper divisors (14066578).

28087886 is a wasteful number, since it uses less digits than its factorization.

28087886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546.

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 28087886 is about 5299.8005622853. The cubic root of 28087886 is about 303.9762720977.

The spelling of 28087886 in words is "twenty-eight million, eighty-seven thousand, eight hundred eighty-six".