28357158 has 32 divisors (see below), whose sum is σ = 61165440. Its totient is φ = 8735040.

The previous prime is 28357151. The next prime is 28357171. The reversal of 28357158 is 85175382.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1641 + ... + 7707.

It is an arithmetic number, because the mean of its divisors is an integer number (1911420).

Almost surely, 2^28357158 is an apocalyptic number.

28357158 is an abundant number, since it is smaller than the sum of its proper divisors (32808282).

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

28357158 is a wasteful number, since it uses less digits than its factorization.

28357158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its digits is 67200, while the sum is 39.

The square root of 28357158 is about 5325.1439417165. The cubic root of 28357158 is about 304.9445675485.

The spelling of 28357158 in words is "twenty-eight million, three hundred fifty-seven thousand, one hundred fifty-eight".