28005452544 has 72 divisors (see below), whose sum is σ = 74568365872. Its totient is φ = 9331015680.

The previous prime is 28005452509. The next prime is 28005452581. The reversal of 28005452544 is 44525450082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2076864 + ... + 2090304.

Almost surely, 2^28005452544 is an apocalyptic number.

28005452544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28005452544 is an abundant number, since it is smaller than the sum of its proper divisors (46562913328).

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

28005452544 is a wasteful number, since it uses less digits than its factorization.

28005452544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16173 (or 16159 counting only the distinct ones).

The product of its (nonzero) digits is 256000, while the sum is 39.

The spelling of 28005452544 in words is "twenty-eight billion, five million, four hundred fifty-two thousand, five hundred forty-four".