28728556754 has 16 divisors (see below), whose sum is σ = 43272581400. Its totient is φ = 14304455424.

The previous prime is 28728556741. The next prime is 28728556799. The reversal of 28728556754 is 45765582782.

It can be written as a sum of positive squares in 4 ways, for example, as 9829731025 + 18898825729 = 99145^2 + 137473^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28728556693 and 28728556702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617252 + ... + 662160.

Almost surely, 2^28728556754 is an apocalyptic number.

28728556754 is a deficient number, since it is larger than the sum of its proper divisors (14544024646).

28728556754 is a wasteful number, since it uses less digits than its factorization.

28728556754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46237.

The product of its digits is 37632000, while the sum is 59.

The spelling of 28728556754 in words is "twenty-eight billion, seven hundred twenty-eight million, five hundred fifty-six thousand, seven hundred fifty-four".