28057728075 has 48 divisors (see below), whose sum is σ = 51307403616. Its totient is φ = 13439692800.

The previous prime is 28057728073. The next prime is 28057728109. The reversal of 28057728075 is 57082775082.

It is not a de Polignac number, because 28057728075 - 2¹ = 28057728073 is a prime.

It is a super-2 number, since 2×28057728075² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28057728073) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 352806 + ... + 424955.

It is an arithmetic number, because the mean of its divisors is an integer number (1068904242).

Almost surely, 2^28057728075 is an apocalyptic number.

28057728075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28057728075 is a deficient number, since it is larger than the sum of its proper divisors (23249675541).

28057728075 is a wasteful number, since it uses less digits than its factorization.

28057728075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777824 (or 777819 counting only the distinct ones).

The product of its (nonzero) digits is 2195200, while the sum is 51.

The spelling of 28057728075 in words is "twenty-eight billion, fifty-seven million, seven hundred twenty-eight thousand, seventy-five".