28303088220 has 108 divisors (see below), whose sum is σ = 94367091000. Its totient is φ = 6861349440.

The previous prime is 28303088147. The next prime is 28303088221. The reversal of 28303088220 is 2288030382.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303088221) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 627970 + ... + 671529.

Almost surely, 2^28303088220 is an apocalyptic number.

28303088220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28303088220 is an abundant number, since it is smaller than the sum of its proper divisors (66064002780).

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

28303088220 is a wasteful number, since it uses less digits than its factorization.

28303088220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299536 (or 1299520 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The spelling of 28303088220 in words is "twenty-eight billion, three hundred three million, eighty-eight thousand, two hundred twenty".