28686855 has 8 divisors (see below), whose sum is σ = 45898992. Its totient is φ = 15299648.

The previous prime is 28686817. The next prime is 28686857. The reversal of 28686855 is 55868682.

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

It is a cyclic number.

It is not a de Polignac number, because 28686855 - 2¹¹ = 28684807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28686857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 956214 + ... + 956243.

It is an arithmetic number, because the mean of its divisors is an integer number (5737374).

Almost surely, 2^28686855 is an apocalyptic number.

28686855 is a deficient number, since it is larger than the sum of its proper divisors (17212137).

28686855 is a wasteful number, since it uses less digits than its factorization.

28686855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912465.

The product of its digits is 921600, while the sum is 48.

The square root of 28686855 is about 5356.0111090251. The cubic root of 28686855 is about 306.1218383630.

The spelling of 28686855 in words is "twenty-eight million, six hundred eighty-six thousand, eight hundred fifty-five".