28558147 has 8 divisors (see below), whose sum is σ = 30690576. Its totient is φ = 26476032.

The previous prime is 28558139. The next prime is 28558163. The reversal of 28558147 is 74185582.

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 28558147 - 2³ = 28558139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28558247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11398 + ... + 13675.

It is an arithmetic number, because the mean of its divisors is an integer number (3836322).

Almost surely, 2^28558147 is an apocalyptic number.

28558147 is a deficient number, since it is larger than the sum of its proper divisors (2132429).

28558147 is a wasteful number, since it uses less digits than its factorization.

28558147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25157.

The product of its digits is 89600, while the sum is 40.

The square root of 28558147 is about 5343.9823165875. The cubic root of 28558147 is about 305.6633310070.

The spelling of 28558147 in words is "twenty-eight million, five hundred fifty-eight thousand, one hundred forty-seven".