28808620288 has 72 divisors (see below), whose sum is σ = 66083501120. Its totient is φ = 12278200320.

The previous prime is 28808620277. The next prime is 28808620333. The reversal of 28808620288 is 88202680882.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279943 + ... + 368761.

Almost surely, 2^28808620288 is an apocalyptic number.

28808620288 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28808620288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33041750560).

28808620288 is an abundant number, since it is smaller than the sum of its proper divisors (37274880832).

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

28808620288 is an equidigital number, since it uses as much as digits as its factorization.

28808620288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89023 (or 89009 counting only the distinct ones).

The product of its (nonzero) digits is 1572864, while the sum is 52.

The spelling of 28808620288 in words is "twenty-eight billion, eight hundred eight million, six hundred twenty thousand, two hundred eighty-eight".