28650549 has 4 divisors (see below), whose sum is σ = 38200736. Its totient is φ = 19100364.

The previous prime is 28650533. The next prime is 28650551. The reversal of 28650549 is 94505682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28650549 - 2⁴ = 28650533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28650509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4775089 + ... + 4775094.

It is an arithmetic number, because the mean of its divisors is an integer number (9550184).

Almost surely, 2^28650549 is an apocalyptic number.

It is an amenable number.

28650549 is a deficient number, since it is larger than the sum of its proper divisors (9550187).

28650549 is an equidigital number, since it uses as much as digits as its factorization.

28650549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9550186.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 28650549 is about 5352.6207599642. The cubic root of 28650549 is about 305.9926415420.

The spelling of 28650549 in words is "twenty-eight million, six hundred fifty thousand, five hundred forty-nine".