28402272000 has 576 divisors, whose sum is σ = 106526085120. Its totient is φ = 7451136000.

The previous prime is 28402271959. The next prime is 28402272023. The reversal of 28402272000 is 27220482.

It is a tau number, because it is divible by the number of its divisors (576).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 61343769 + ... + 61344231.

It is an arithmetic number, because the mean of its divisors is an integer number (184941120).

Almost surely, 2^28402272000 is an apocalyptic number.

28402272000 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 28402272000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53263042560).

28402272000 is an abundant number, since it is smaller than the sum of its proper divisors (78123813120).

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

28402272000 is an equidigital number, since it uses as much as digits as its factorization.

28402272000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

Adding to 28402272000 its reverse (27220482), we get a palindrome (28429492482).

The spelling of 28402272000 in words is "twenty-eight billion, four hundred two million, two hundred seventy-two thousand".