28005502805500 has 48 divisors (see below), whose sum is σ = 66724383424608. Its totient is φ = 10183819200000.

The previous prime is 28005502805471. The next prime is 28005502805521. The reversal of 28005502805500 is 550820550082.

It is a happy number.

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, 2545949301 + ... + 2545960300.

It is an arithmetic number, because the mean of its divisors is an integer number (1390091321346).

Almost surely, 2^{28005502805500} is an apocalyptic number.

28005502805500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28005502805500 is an abundant number, since it is smaller than the sum of its proper divisors (38718880619108).

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

28005502805500 is a wasteful number, since it uses less digits than its factorization.

28005502805500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091909631 (or 5091909619 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 40.

The spelling of 28005502805500 in words is "twenty-eight trillion, five billion, five hundred two million, eight hundred five thousand, five hundred".