28036549 has 2 divisors, whose sum is σ = 28036550. Its totient is φ = 28036548.

The previous prime is 28036529. The next prime is 28036577. The reversal of 28036549 is 94563082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21224449 + 6812100 = 4607^2 + 2610^2 .

It is a cyclic number.

It is not a de Polignac number, because 28036549 - 2¹⁷ = 27905477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28036529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14018274 + 14018275.

It is an arithmetic number, because the mean of its divisors is an integer number (14018275).

Almost surely, 2^28036549 is an apocalyptic number.

It is an amenable number.

28036549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28036549 is an equidigital number, since it uses as much as digits as its factorization.

28036549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 28036549 is about 5294.9550517450. The cubic root of 28036549 is about 303.7909638962.

The spelling of 28036549 in words is "twenty-eight million, thirty-six thousand, five hundred forty-nine".