28005893272 has 128 divisors (see below), whose sum is σ = 62941409280. Its totient is φ = 11430720000.

The previous prime is 28005893231. The next prime is 28005893273. The reversal of 28005893272 is 27239850082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28005893273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36995518 + ... + 36996274.

It is an arithmetic number, because the mean of its divisors is an integer number (491729760).

Almost surely, 2^28005893272 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 28005893272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31470704640).

28005893272 is an abundant number, since it is smaller than the sum of its proper divisors (34935516008).

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

28005893272 is a wasteful number, since it uses less digits than its factorization.

28005893272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 28005893272 in words is "twenty-eight billion, five million, eight hundred ninety-three thousand, two hundred seventy-two".