28182961 has 2 divisors, whose sum is σ = 28182962. Its totient is φ = 28182960.

The previous prime is 28182893. The next prime is 28182971. The reversal of 28182961 is 16928182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20647936 + 7535025 = 4544^2 + 2745^2 .

It is a cyclic number.

It is not a de Polignac number, because 28182961 - 2⁹ = 28182449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28182961.

It is not a weakly prime, because it can be changed into another prime (28182971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14091480 + 14091481.

It is an arithmetic number, because the mean of its divisors is an integer number (14091481).

Almost surely, 2^28182961 is an apocalyptic number.

It is an amenable number.

28182961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28182961 is an equidigital number, since it uses as much as digits as its factorization.

28182961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 37.

The square root of 28182961 is about 5308.7626618639. The cubic root of 28182961 is about 304.3188634039.

The spelling of 28182961 in words is "twenty-eight million, one hundred eighty-two thousand, nine hundred sixty-one".