28058181788 has 48 divisors (see below), whose sum is σ = 60453173760. Its totient is φ = 11096236224.

The previous prime is 28058181751. The next prime is 28058181791. The reversal of 28058181788 is 88718185082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249403 + ... + 1271661.

It is an arithmetic number, because the mean of its divisors is an integer number (1259441120).

Almost surely, 2^28058181788 is an apocalyptic number.

28058181788 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28058181788 is an abundant number, since it is smaller than the sum of its proper divisors (32394991972).

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

28058181788 is a wasteful number, since it uses less digits than its factorization.

28058181788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25746 (or 25744 counting only the distinct ones).

The product of its (nonzero) digits is 2293760, while the sum is 56.

The spelling of 28058181788 in words is "twenty-eight billion, fifty-eight million, one hundred eighty-one thousand, seven hundred eighty-eight".