28144223548 has 24 divisors (see below), whose sum is σ = 56303592800. Its totient is φ = 12058564608.

The previous prime is 28144223533. The next prime is 28144223551. The reversal of 28144223548 is 84532244182.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27813 + ... + 238876.

Almost surely, 2^28144223548 is an apocalyptic number.

28144223548 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28144223548 is an abundant number, since it is smaller than the sum of its proper divisors (28159369252).

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

28144223548 is a wasteful number, since it uses less digits than its factorization.

28144223548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270469 (or 270467 counting only the distinct ones).

The product of its digits is 491520, while the sum is 43.

The spelling of 28144223548 in words is "twenty-eight billion, one hundred forty-four million, two hundred twenty-three thousand, five hundred forty-eight".