28028563460 has 48 divisors (see below), whose sum is σ = 60089526000. Its totient is φ = 10978066944.

The previous prime is 28028563447. The next prime is 28028563483. The reversal of 28028563460 is 6436582082.

It can be written as a sum of positive squares in 8 ways, for example, as 104816644 + 27923746816 = 10238^2 + 167104^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 513566 + ... + 565514.

It is an arithmetic number, because the mean of its divisors is an integer number (1251865125).

Almost surely, 2^28028563460 is an apocalyptic number.

28028563460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28028563460 is an abundant number, since it is smaller than the sum of its proper divisors (32060962540).

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

28028563460 is a wasteful number, since it uses less digits than its factorization.

28028563460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52520 (or 52518 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 44.

The spelling of 28028563460 in words is "twenty-eight billion, twenty-eight million, five hundred sixty-three thousand, four hundred sixty".