28250528436 has 60 divisors (see below), whose sum is σ = 79533432132. Its totient is φ = 8692468992.

The previous prime is 28250528407. The next prime is 28250528441. The reversal of 28250528436 is 63482505282.

28250528436 is a `hidden beast` number, since 2 + 82 + 5 + 0 + 528 + 43 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18566787600 + 9683740836 = 136260^2 + 98406^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28250528391 and 28250528400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3349365 + ... + 3357788.

Almost surely, 2^28250528436 is an apocalyptic number.

28250528436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

28250528436 is an abundant number, since it is smaller than the sum of its proper divisors (51282903696).

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

28250528436 is a wasteful number, since it uses less digits than its factorization.

28250528436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707182 (or 6707171 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 28250528436 in words is "twenty-eight billion, two hundred fifty million, five hundred twenty-eight thousand, four hundred thirty-six".