28909093281000 has 128 divisors (see below), whose sum is σ = 90736470639360. Its totient is φ = 7662929184000.

The previous prime is 28909093280989. The next prime is 28909093281049. The reversal of 28909093281000 is 18239090982.

28909093281000 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×28909093281000² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28350391 + ... + 29352390.

It is an arithmetic number, because the mean of its divisors is an integer number (708878676870).

Almost surely, 2^{28909093281000} is an apocalyptic number.

28909093281000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28909093281000 is an abundant number, since it is smaller than the sum of its proper divisors (61827377358360).

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

28909093281000 is a wasteful number, since it uses less digits than its factorization.

28909093281000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57702972 (or 57702958 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 51.

The spelling of 28909093281000 in words is "twenty-eight trillion, nine hundred nine billion, ninety-three million, two hundred eighty-one thousand".