28858145 has 8 divisors (see below), whose sum is σ = 34665000. Its totient is φ = 23063040.

The previous prime is 28858133. The next prime is 28858157. The reversal of 28858145 is 54185882.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28858133) and next prime (28858157).

It can be written as a sum of positive squares in 4 ways, for example, as 1274641 + 27583504 = 1129^2 + 5252^2 .

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

It is not a de Polignac number, because 28858145 - 2⁸ = 28857889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3935 + ... + 8555.

It is an arithmetic number, because the mean of its divisors is an integer number (4333125).

Almost surely, 2^28858145 is an apocalyptic number.

It is an amenable number.

28858145 is a deficient number, since it is larger than the sum of its proper divisors (5806855).

28858145 is a wasteful number, since it uses less digits than its factorization.

28858145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5875.

The product of its digits is 102400, while the sum is 41.

The square root of 28858145 is about 5371.9777549800. The cubic root of 28858145 is about 306.7299169841.

The spelling of 28858145 in words is "twenty-eight million, eight hundred fifty-eight thousand, one hundred forty-five".