28275557775 has 48 divisors (see below), whose sum is σ = 47221873440. Its totient is φ = 14928076800.

The previous prime is 28275557759. The next prime is 28275557831. The reversal of 28275557775 is 57775557282.

It is a happy number.

It is not a de Polignac number, because 28275557775 - 2⁴ = 28275557759 is a prime.

It is a super-3 number, since 3×28275557775³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 9058215 + ... + 9061335.

It is an arithmetic number, because the mean of its divisors is an integer number (983789030).

Almost surely, 2^28275557775 is an apocalyptic number.

28275557775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28275557775 is a deficient number, since it is larger than the sum of its proper divisors (18946315665).

28275557775 is a wasteful number, since it uses less digits than its factorization.

28275557775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4316 (or 4311 counting only the distinct ones).

The product of its digits is 48020000, while the sum is 60.

The spelling of 28275557775 in words is "twenty-eight billion, two hundred seventy-five million, five hundred fifty-seven thousand, seven hundred seventy-five".