28161071 has 2 divisors, whose sum is σ = 28161072. Its totient is φ = 28161070.

The previous prime is 28161041. The next prime is 28161083. The reversal of 28161071 is 17016182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28161071 - 2¹⁰ = 28160047 is a prime.

It is equal to p_1750832 and since 28161071 and 1750832 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28161071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28161031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14080535 + 14080536.

It is an arithmetic number, because the mean of its divisors is an integer number (14080536).

Almost surely, 2^28161071 is an apocalyptic number.

28161071 is a deficient number, since it is larger than the sum of its proper divisors (1).

28161071 is an equidigital number, since it uses as much as digits as its factorization.

28161071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 28161071 is about 5306.7005756873. The cubic root of 28161071 is about 304.2400537837.

The spelling of 28161071 in words is "twenty-eight million, one hundred sixty-one thousand, seventy-one".