28027322280 has 96 divisors (see below), whose sum is σ = 91124265960. Its totient is φ = 7471042560.

The previous prime is 28027322251. The next prime is 28027322303. The reversal of 28027322280 is 8222372082.

It can be written as a sum of positive squares in 4 ways, for example, as 26671462596 + 1355859684 = 163314^2 + 36822^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1006140 + ... + 1033620.

Almost surely, 2^28027322280 is an apocalyptic number.

28027322280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28027322280 is an abundant number, since it is smaller than the sum of its proper divisors (63096943680).

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

28027322280 is a wasteful number, since it uses less digits than its factorization.

28027322280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30331 (or 30324 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The spelling of 28027322280 in words is "twenty-eight billion, twenty-seven million, three hundred twenty-two thousand, two hundred eighty".