28994549 has 2 divisors, whose sum is σ = 28994550. Its totient is φ = 28994548.

The previous prime is 28994531. The next prime is 28994593. The reversal of 28994549 is 94549982.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15171025 + 13823524 = 3895^2 + 3718^2 .

It is a cyclic number.

It is not a de Polignac number, because 28994549 - 2⁸ = 28994293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28994497 and 28994506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28999549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14497274 + 14497275.

It is an arithmetic number, because the mean of its divisors is an integer number (14497275).

Almost surely, 2^28994549 is an apocalyptic number.

It is an amenable number.

28994549 is a deficient number, since it is larger than the sum of its proper divisors (1).

28994549 is an equidigital number, since it uses as much as digits as its factorization.

28994549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 50.

The square root of 28994549 is about 5384.6586707051. The cubic root of 28994549 is about 307.2124317083.

The spelling of 28994549 in words is "twenty-eight million, nine hundred ninety-four thousand, five hundred forty-nine".