28017655 has 8 divisors (see below), whose sum is σ = 34255872. Its totient is φ = 21991008.

The previous prime is 28017643. The next prime is 28017677. The reversal of 28017655 is 55671082.

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 28017655 - 2⁷ = 28017527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28017655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52599 + ... + 53128.

It is an arithmetic number, because the mean of its divisors is an integer number (4281984).

Almost surely, 2^28017655 is an apocalyptic number.

28017655 is a deficient number, since it is larger than the sum of its proper divisors (6238217).

28017655 is a wasteful number, since it uses less digits than its factorization.

28017655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105785.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 28017655 is about 5293.1705999335. The cubic root of 28017655 is about 303.7227063713.

The spelling of 28017655 in words is "twenty-eight million, seventeen thousand, six hundred fifty-five".