28862649 has 20 divisors (see below), whose sum is σ = 43281700. Its totient is φ = 19167840.

The previous prime is 28862609. The next prime is 28862663. The reversal of 28862649 is 94626882.

It can be written as a sum of positive squares in 2 ways, for example, as 19053225 + 9809424 = 4365^2 + 3132^2 .

It is not a de Polignac number, because 28862649 - 2⁹ = 28862137 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 (28862609) 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 19 ways as a sum of consecutive naturals, for example, 27759 + ... + 28779.

It is an arithmetic number, because the mean of its divisors is an integer number (2164085).

Almost surely, 2^28862649 is an apocalyptic number.

It is an amenable number.

28862649 is a deficient number, since it is larger than the sum of its proper divisors (14419051).

28862649 is a wasteful number, since it uses less digits than its factorization.

28862649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1382 (or 1373 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 28862649 is about 5372.3969510824. The cubic root of 28862649 is about 306.7458736540.

The spelling of 28862649 in words is "twenty-eight million, eight hundred sixty-two thousand, six hundred forty-nine".