28545270722 has 4 divisors (see below), whose sum is σ = 42817906086. Its totient is φ = 14272635360.

The previous prime is 28545270709. The next prime is 28545270773. The reversal of 28545270722 is 22707254582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22707254582 = 2 ⋅11353627291.

It can be written as a sum of positive squares in only one way, i.e., 15507969961 + 13037300761 = 124531^2 + 114181^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7136317679 + ... + 7136317682.

Almost surely, 2^28545270722 is an apocalyptic number.

28545270722 is a deficient number, since it is larger than the sum of its proper divisors (14272635364).

28545270722 is a wasteful number, since it uses less digits than its factorization.

28545270722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14272635363.

The product of its (nonzero) digits is 627200, while the sum is 44.

The spelling of 28545270722 in words is "twenty-eight billion, five hundred forty-five million, two hundred seventy thousand, seven hundred twenty-two".