28549013 has 2 divisors, whose sum is σ = 28549014. Its totient is φ = 28549012.

The previous prime is 28548977. The next prime is 28549051. The reversal of 28549013 is 31094582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26801329 + 1747684 = 5177^2 + 1322^2 .

It is a cyclic number.

It is not a de Polignac number, because 28549013 - 2¹⁰ = 28547989 is a prime.

It is a super-2 number, since 2×28549013² = 1630092286548338, which contains 22 as substring.

It is equal to p_1773464 and since 28549013 and 1773464 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28549063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14274506 + 14274507.

It is an arithmetic number, because the mean of its divisors is an integer number (14274507).

Almost surely, 2^28549013 is an apocalyptic number.

It is an amenable number.

28549013 is a deficient number, since it is larger than the sum of its proper divisors (1).

28549013 is an equidigital number, since it uses as much as digits as its factorization.

28549013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 28549013 is about 5343.1276421212. The cubic root of 28549013 is about 305.6307398802.

The spelling of 28549013 in words is "twenty-eight million, five hundred forty-nine thousand, thirteen".