28013055600 has 120 divisors (see below), whose sum is σ = 95013762480. Its totient is φ = 7030722560.

The previous prime is 28013055571. The next prime is 28013055601. The reversal of 28013055600 is 655031082.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013055601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 666195 + ... + 706994.

It is an arithmetic number, because the mean of its divisors is an integer number (791781354).

Almost surely, 2^28013055600 is an apocalyptic number.

28013055600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28013055600 is an abundant number, since it is smaller than the sum of its proper divisors (67000706880).

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

28013055600 is a wasteful number, since it uses less digits than its factorization.

28013055600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373227 (or 1373216 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 28013055600 its reverse (655031082), we get a palindrome (28668086682).

The spelling of 28013055600 in words is "twenty-eight billion, thirteen million, fifty-five thousand, six hundred".