28571149 has 2 divisors, whose sum is σ = 28571150. Its totient is φ = 28571148.

The previous prime is 28571143. The next prime is 28571161. The reversal of 28571149 is 94117582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 2866249 = 5070^2 + 1693^2 .

It is a cyclic number.

It is not a de Polignac number, because 28571149 - 2⁷ = 28571021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28571143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14285574 + 14285575.

It is an arithmetic number, because the mean of its divisors is an integer number (14285575).

Almost surely, 2^28571149 is an apocalyptic number.

It is an amenable number.

28571149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28571149 is an equidigital number, since it uses as much as digits as its factorization.

28571149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 28571149 is about 5345.1986866720. The cubic root of 28571149 is about 305.7097116032.

The spelling of 28571149 in words is "twenty-eight million, five hundred seventy-one thousand, one hundred forty-nine".