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28675573 = 42168113
BaseRepresentation
bin110110101100…
…0110111110101
31222221212111021
41231120313311
524320104243
62502341141
7465511153
oct155306765
958855437
1028675573
1115206423
12972a7b1
135c301c4
143b463d3
1527b66ed
hex1b58df5

28675573 has 4 divisors (see below), whose sum is σ = 28744108. Its totient is φ = 28607040.

The previous prime is 28675571. The next prime is 28675613. The reversal of 28675573 is 37557682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37557682 = 218778841.

It can be written as a sum of positive squares in 2 ways, for example, as 2696164 + 25979409 = 1642^2 + 5097^2 .

It is a cyclic number.

It is not a de Polignac number, because 28675573 - 21 = 28675571 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28675571) 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, 33636 + ... + 34477.

It is an arithmetic number, because the mean of its divisors is an integer number (7186027).

Almost surely, 228675573 is an apocalyptic number.

It is an amenable number.

28675573 is a deficient number, since it is larger than the sum of its proper divisors (68535).

28675573 is an equidigital number, since it uses as much as digits as its factorization.

28675573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68534.

The product of its digits is 352800, while the sum is 43.

The square root of 28675573 is about 5354.9577962856. The cubic root of 28675573 is about 306.0817024490.

The spelling of 28675573 in words is "twenty-eight million, six hundred seventy-five thousand, five hundred seventy-three".

Divisors: 1 421 68113 28675573