28185061 has 2 divisors, whose sum is σ = 28185062. Its totient is φ = 28185060.

The previous prime is 28185019. The next prime is 28185103. The reversal of 28185061 is 16058182.

It is a balanced prime because it is at equal distance from previous prime (28185019) and next prime (28185103).

It can be written as a sum of positive squares in only one way, i.e., 24502500 + 3682561 = 4950^2 + 1919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28185061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28185011) 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 as a sum of consecutive naturals, namely, 14092530 + 14092531.

It is an arithmetic number, because the mean of its divisors is an integer number (14092531).

Almost surely, 2^28185061 is an apocalyptic number.

It is an amenable number.

28185061 is a deficient number, since it is larger than the sum of its proper divisors (1).

28185061 is an equidigital number, since it uses as much as digits as its factorization.

28185061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 28185061 is about 5308.9604443808. The cubic root of 28185061 is about 304.3264217976.

The spelling of 28185061 in words is "twenty-eight million, one hundred eighty-five thousand, sixty-one".