28835861 has 2 divisors, whose sum is σ = 28835862. Its totient is φ = 28835860.

The previous prime is 28835857. The next prime is 28835867. The reversal of 28835861 is 16853882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27772900 + 1062961 = 5270^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 28835861 - 2² = 28835857 is a prime.

It is a super-2 number, since 2×28835861² = 1663013759222642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28835867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14417930 + 14417931.

It is an arithmetic number, because the mean of its divisors is an integer number (14417931).

Almost surely, 2^28835861 is an apocalyptic number.

It is an amenable number.

28835861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28835861 is an equidigital number, since it uses as much as digits as its factorization.

28835861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 41.

The square root of 28835861 is about 5369.9032579740. The cubic root of 28835861 is about 306.6509452926.

The spelling of 28835861 in words is "twenty-eight million, eight hundred thirty-five thousand, eight hundred sixty-one".