28469939049 has 48 divisors (see below), whose sum is σ = 45500495040. Its totient is φ = 17726791680.

The previous prime is 28469939041. The next prime is 28469939053. The reversal of 28469939049 is 94093996482.

It is a happy number.

It is not a de Polignac number, because 28469939049 - 2³ = 28469939041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28469939041) 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 in 47 ways as a sum of consecutive naturals, for example, 514857 + ... + 567465.

It is an arithmetic number, because the mean of its divisors is an integer number (947926980).

Almost surely, 2^28469939049 is an apocalyptic number.

It is an amenable number.

28469939049 is a deficient number, since it is larger than the sum of its proper divisors (17030555991).

28469939049 is a wasteful number, since it uses less digits than its factorization.

28469939049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52772 (or 52760 counting only the distinct ones).

The product of its (nonzero) digits is 30233088, while the sum is 63.

The spelling of 28469939049 in words is "twenty-eight billion, four hundred sixty-nine million, nine hundred thirty-nine thousand, forty-nine".