28264961 has 2 divisors, whose sum is σ = 28264962. Its totient is φ = 28264960.

The previous prime is 28264939. The next prime is 28264967. The reversal of 28264961 is 16946282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23668225 + 4596736 = 4865^2 + 2144^2 .

It is a cyclic number.

It is not a de Polignac number, because 28264961 - 2¹⁸ = 28002817 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_1756892 and since 28264961 and 1756892 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 (28264967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14132480 + 14132481.

It is an arithmetic number, because the mean of its divisors is an integer number (14132481).

Almost surely, 2^28264961 is an apocalyptic number.

It is an amenable number.

28264961 is a deficient number, since it is larger than the sum of its proper divisors (1).

28264961 is an equidigital number, since it uses as much as digits as its factorization.

28264961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 28264961 is about 5316.4801325689. The cubic root of 28264961 is about 304.6137222252.

The spelling of 28264961 in words is "twenty-eight million, two hundred sixty-four thousand, nine hundred sixty-one".