28201552020 has 54 divisors (see below), whose sum is σ = 85551542622. Its totient is φ = 7519813056.

The previous prime is 28201551979. The next prime is 28201552037. The reversal of 28201552020 is 2025510282.

It can be written as a sum of positive squares in 3 ways, for example, as 16091429904 + 12110122116 = 126852^2 + 110046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2246802 + ... + 2259318.

Almost surely, 2^28201552020 is an apocalyptic number.

28201552020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28201552020 is an abundant number, since it is smaller than the sum of its proper divisors (57349990602).

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

28201552020 is an equidigital number, since it uses as much as digits as its factorization.

28201552020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25049 (or 12527 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The spelling of 28201552020 in words is "twenty-eight billion, two hundred one million, five hundred fifty-two thousand, twenty".