28717158 has 8 divisors (see below), whose sum is σ = 57434328. Its totient is φ = 9572384.

The previous prime is 28717127. The next prime is 28717159. The reversal of 28717158 is 85171782.

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

28717158 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28717159) 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, 2393091 + ... + 2393102.

It is an arithmetic number, because the mean of its divisors is an integer number (7179291).

Almost surely, 2^28717158 is an apocalyptic number.

28717158 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28717158 is a wasteful number, since it uses less digits than its factorization.

28717158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4786198.

The product of its digits is 31360, while the sum is 39.

The square root of 28717158 is about 5358.8392399847. The cubic root of 28717158 is about 306.2295897546.

The spelling of 28717158 in words is "twenty-eight million, seven hundred seventeen thousand, one hundred fifty-eight".