28002843072 has 280 divisors, whose sum is σ = 85017620160. Its totient is φ = 9111398400.

The previous prime is 28002843049. The next prime is 28002843073. The reversal of 28002843072 is 27034820082.

28002843072 is a `hidden beast` number, since 280 + 0 + 284 + 30 + 72 = 666.

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 (28002843073) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41362798 + ... + 41363474.

Almost surely, 2^28002843072 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 28002843072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42508810080).

28002843072 is an abundant number, since it is smaller than the sum of its proper divisors (57014777088).

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

28002843072 is a wasteful number, since it uses less digits than its factorization.

28002843072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881 (or 862 counting only the distinct ones).

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

The spelling of 28002843072 in words is "twenty-eight billion, two million, eight hundred forty-three thousand, seventy-two".