28010649 has 4 divisors (see below), whose sum is σ = 37347536. Its totient is φ = 18673764.

The previous prime is 28010629. The next prime is 28010657. The reversal of 28010649 is 94601082.

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 28010649 - 2⁹ = 28010137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28010629) 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, 4668439 + ... + 4668444.

It is an arithmetic number, because the mean of its divisors is an integer number (9336884).

Almost surely, 2^28010649 is an apocalyptic number.

It is an amenable number.

28010649 is a deficient number, since it is larger than the sum of its proper divisors (9336887).

28010649 is an equidigital number, since it uses as much as digits as its factorization.

28010649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9336886.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28010649 is about 5292.5087623924. The cubic root of 28010649 is about 303.6973883035.

The spelling of 28010649 in words is "twenty-eight million, ten thousand, six hundred forty-nine".