28947026681040 has 320 divisors, whose sum is σ = 97008236075520. Its totient is φ = 7098213703680.

The previous prime is 28947026681033. The next prime is 28947026681071. The reversal of 28947026681040 is 4018662074982.

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, 905342494 + ... + 905374466.

It is an arithmetic number, because the mean of its divisors is an integer number (303150737736).

Almost surely, 2^{28947026681040} is an apocalyptic number.

28947026681040 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 28947026681040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48504118037760).

28947026681040 is an abundant number, since it is smaller than the sum of its proper divisors (68061209394480).

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

28947026681040 is a wasteful number, since it uses less digits than its factorization.

28947026681040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33102 (or 33096 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 28947026681040 in words is "twenty-eight trillion, nine hundred forty-seven billion, twenty-six million, six hundred eighty-one thousand, forty".