28545273856 has 104 divisors (see below), whose sum is σ = 63959783904. Its totient is φ = 12623708160.

The previous prime is 28545273853. The next prime is 28545273863. The reversal of 28545273856 is 65837254582.

It is a junction number, because it is equal to n+sod(n) for n = 28545273797 and 28545273806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545273853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1658511 + ... + 1675633.

Almost surely, 2^28545273856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28545273856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31979891952).

28545273856 is an abundant number, since it is smaller than the sum of its proper divisors (35414510048).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28545273856 is a wasteful number, since it uses less digits than its factorization.

28545273856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17195 (or 17173 counting only the distinct ones).

The product of its digits is 16128000, while the sum is 55.

The spelling of 28545273856 in words is "twenty-eight billion, five hundred forty-five million, two hundred seventy-three thousand, eight hundred fifty-six".