28618805 has 8 divisors (see below), whose sum is σ = 34372512. Its totient is φ = 22875088.

The previous prime is 28618789. The next prime is 28618823. The reversal of 28618805 is 50881682.

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 28618805 - 2⁴ = 28618789 is a prime.

It is a Duffinian number.

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, 7334 + ... + 10536.

It is an arithmetic number, because the mean of its divisors is an integer number (4296564).

Almost surely, 2^28618805 is an apocalyptic number.

It is an amenable number.

28618805 is a deficient number, since it is larger than the sum of its proper divisors (5753707).

28618805 is a wasteful number, since it uses less digits than its factorization.

28618805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995.

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 28618805 is about 5349.6546617515. The cubic root of 28618805 is about 305.8795893742.

It can be divided in two parts, 286 and 18805, that added together give a palindrome (19091).

The spelling of 28618805 in words is "twenty-eight million, six hundred eighteen thousand, eight hundred five".