28253425536 has 256 divisors, whose sum is σ = 100906560000. Its totient is φ = 7597449216.

The previous prime is 28253425531. The next prime is 28253425547. The reversal of 28253425536 is 63552435282.

28253425536 is a `hidden beast` number, since 2 + 8 + 2 + 53 + 42 + 553 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28253425491 and 28253425500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253425531) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 376915 + ... + 445613.

It is an arithmetic number, because the mean of its divisors is an integer number (394166250).

Almost surely, 2^28253425536 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 28253425536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50453280000).

28253425536 is an abundant number, since it is smaller than the sum of its proper divisors (72653134464).

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

28253425536 is a wasteful number, since it uses less digits than its factorization.

28253425536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68746 (or 68728 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 45.

The spelling of 28253425536 in words is "twenty-eight billion, two hundred fifty-three million, four hundred twenty-five thousand, five hundred thirty-six".