28115519007144 has 32 divisors (see below), whose sum is σ = 70288929033120. Its totient is φ = 9371822133696.

The previous prime is 28115519007139. The next prime is 28115519007157. The reversal of 28115519007144 is 44170091551182.

It is a junction number, because it is equal to n+sod(n) for n = 28115519007093 and 28115519007102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21536479 + ... + 22804625.

It is an arithmetic number, because the mean of its divisors is an integer number (2196529032285).

Almost surely, 2^{28115519007144} is an apocalyptic number.

28115519007144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28115519007144 is an abundant number, since it is smaller than the sum of its proper divisors (42173410025976).

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

28115519007144 is a wasteful number, since it uses less digits than its factorization.

28115519007144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191929 (or 2191925 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 28115519007144 in words is "twenty-eight trillion, one hundred fifteen billion, five hundred nineteen million, seven thousand, one hundred forty-four".