28211480280 has 640 divisors, whose sum is σ = 104878540800. Its totient is φ = 6772211712.

The previous prime is 28211480279. The next prime is 28211480309. The reversal of 28211480280 is 8208411282.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 222137577 + ... + 222137703.

It is an arithmetic number, because the mean of its divisors is an integer number (163872720).

Almost surely, 2^28211480280 is an apocalyptic number.

28211480280 is a gapful number since it is divisible by the number (20) 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 28211480280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52439270400).

28211480280 is an abundant number, since it is smaller than the sum of its proper divisors (76667060520).

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

28211480280 is a wasteful number, since it uses less digits than its factorization.

28211480280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The spelling of 28211480280 in words is "twenty-eight billion, two hundred eleven million, four hundred eighty thousand, two hundred eighty".