28028077575 has 24 divisors (see below), whose sum is σ = 46346142288. Its totient is φ = 14946247680.

The previous prime is 28028077573. The next prime is 28028077579. The reversal of 28028077575 is 57577082082.

It is not a de Polignac number, because 28028077575 - 2¹ = 28028077573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028077573) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 633889 + ... + 676661.

It is an arithmetic number, because the mean of its divisors is an integer number (1931089262).

Almost surely, 2^28028077575 is an apocalyptic number.

28028077575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28028077575 is a deficient number, since it is larger than the sum of its proper divisors (18318064713).

28028077575 is a wasteful number, since it uses less digits than its factorization.

28028077575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51523 (or 51518 counting only the distinct ones).

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

The spelling of 28028077575 in words is "twenty-eight billion, twenty-eight million, seventy-seven thousand, five hundred seventy-five".