28439650 has 24 divisors (see below), whose sum is σ = 54191844. Its totient is φ = 11097600.

The previous prime is 28439629. The next prime is 28439651. The reversal of 28439650 is 5693482.

It can be written as a sum of positive squares in 6 ways, for example, as 3229209 + 25210441 = 1797^2 + 5021^2 .

It is not an unprimeable number, because it can be changed into a prime (28439651) 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 11 ways as a sum of consecutive naturals, for example, 4887 + ... + 8986.

Almost surely, 2^28439650 is an apocalyptic number.

28439650 is a deficient number, since it is larger than the sum of its proper divisors (25752194).

28439650 is a wasteful number, since it uses less digits than its factorization.

28439650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13926 (or 13921 counting only the distinct ones).

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

The square root of 28439650 is about 5332.8838352246. The cubic root of 28439650 is about 305.2399795437.

The spelling of 28439650 in words is "twenty-eight million, four hundred thirty-nine thousand, six hundred fifty".