28061002872 has 384 divisors, whose sum is σ = 94598400000. Its totient is φ = 7489407744.

The previous prime is 28061002861. The next prime is 28061002889. The reversal of 28061002872 is 27820016082.

It is a happy number.

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 95 ways as a sum of consecutive naturals, for example, 37068318 + ... + 37069074.

It is an arithmetic number, because the mean of its divisors is an integer number (246350000).

Almost surely, 2^28061002872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28061002872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47299200000).

28061002872 is an abundant number, since it is smaller than the sum of its proper divisors (66537397128).

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

28061002872 is a wasteful number, since it uses less digits than its factorization.

28061002872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888 (or 867 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 28061002872 in words is "twenty-eight billion, sixty-one million, two thousand, eight hundred seventy-two".