28856918 has 8 divisors (see below), whose sum is σ = 43731912. Its totient is φ = 14279616.

The previous prime is 28856917. The next prime is 28856957. The reversal of 28856918 is 81965882.

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 (28856917) 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, 74180 + ... + 74567.

It is an arithmetic number, because the mean of its divisors is an integer number (5466489).

Almost surely, 2^28856918 is an apocalyptic number.

28856918 is a deficient number, since it is larger than the sum of its proper divisors (14874994).

28856918 is a wasteful number, since it uses less digits than its factorization.

28856918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148846.

The product of its digits is 276480, while the sum is 47.

The square root of 28856918 is about 5371.8635500169. The cubic root of 28856918 is about 306.7255697084.

The spelling of 28856918 in words is "twenty-eight million, eight hundred fifty-six thousand, nine hundred eighteen".