28805678 has 8 divisors (see below), whose sum is σ = 47136600. Its totient is φ = 13093480.

The previous prime is 28805677. The next prime is 28805737. The reversal of 28805678 is 87650882.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28805677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 654653 + ... + 654696.

It is an arithmetic number, because the mean of its divisors is an integer number (5892075).

Almost surely, 2^28805678 is an apocalyptic number.

28805678 is a deficient number, since it is larger than the sum of its proper divisors (18330922).

28805678 is a wasteful number, since it uses less digits than its factorization.

28805678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309362.

The product of its (nonzero) digits is 215040, while the sum is 44.

The square root of 28805678 is about 5367.0921363435. The cubic root of 28805678 is about 306.5439156382.

It can be divided in two parts, 2880 and 5678, that added together give a palindrome (8558).

The spelling of 28805678 in words is "twenty-eight million, eight hundred five thousand, six hundred seventy-eight".