28033681020 has 96 divisors (see below), whose sum is σ = 84045729600. Its totient is φ = 6956826624.

The previous prime is 28033681007. The next prime is 28033681051. The reversal of 28033681020 is 2018633082.

It is a super-2 number, since 2×28033681020² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63625 + ... + 245184.

It is an arithmetic number, because the mean of its divisors is an integer number (875476350).

Almost surely, 2^28033681020 is an apocalyptic number.

28033681020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28033681020 is an abundant number, since it is smaller than the sum of its proper divisors (56012048580).

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

28033681020 is a wasteful number, since it uses less digits than its factorization.

28033681020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308927 (or 308925 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 28033681020 in words is "twenty-eight billion, thirty-three million, six hundred eighty-one thousand, twenty".