28549357940 has 48 divisors (see below), whose sum is σ = 60875959872. Its totient is φ = 11244220416.

The previous prime is 28549357937. The next prime is 28549357979. The reversal of 28549357940 is 4975394582.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4629299 + ... + 4635461.

It is an arithmetic number, because the mean of its divisors is an integer number (1268249164).

Almost surely, 2^28549357940 is an apocalyptic number.

28549357940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28549357940 is an abundant number, since it is smaller than the sum of its proper divisors (32326601932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28549357940 is a wasteful number, since it uses less digits than its factorization.

28549357940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9696 (or 9694 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 56.

The spelling of 28549357940 in words is "twenty-eight billion, five hundred forty-nine million, three hundred fifty-seven thousand, nine hundred forty".