28174561 has 2 divisors, whose sum is σ = 28174562. Its totient is φ = 28174560.

The previous prime is 28174547. The next prime is 28174571. The reversal of 28174561 is 16547182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26368225 + 1806336 = 5135^2 + 1344^2 .

It is a cyclic number.

It is not a de Polignac number, because 28174561 - 2⁵ = 28174529 is a prime.

It is not a weakly prime, because it can be changed into another prime (28174541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14087280 + 14087281.

It is an arithmetic number, because the mean of its divisors is an integer number (14087281).

Almost surely, 2^28174561 is an apocalyptic number.

It is an amenable number.

28174561 is a deficient number, since it is larger than the sum of its proper divisors (1).

28174561 is an equidigital number, since it uses as much as digits as its factorization.

28174561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 28174561 is about 5307.9714580996. The cubic root of 28174561 is about 304.2886260741.

The spelling of 28174561 in words is "twenty-eight million, one hundred seventy-four thousand, five hundred sixty-one".