28806361 has 2 divisors, whose sum is σ = 28806362. Its totient is φ = 28806360.

The previous prime is 28806293. The next prime is 28806377. The reversal of 28806361 is 16360882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16451136 + 12355225 = 4056^2 + 3515^2 .

It is a cyclic number.

It is not a de Polignac number, because 28806361 - 2⁷ = 28806233 is a prime.

It is equal to p_1788415 and since 28806361 and 1788415 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28806761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14403180 + 14403181.

It is an arithmetic number, because the mean of its divisors is an integer number (14403181).

Almost surely, 2^28806361 is an apocalyptic number.

It is an amenable number.

28806361 is a deficient number, since it is larger than the sum of its proper divisors (1).

28806361 is an equidigital number, since it uses as much as digits as its factorization.

28806361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28806361 is about 5367.1557644622. The cubic root of 28806361 is about 306.5463383994.

The spelling of 28806361 in words is "twenty-eight million, eight hundred six thousand, three hundred sixty-one".