28000016444 has 24 divisors (see below), whose sum is σ = 51592694160. Its totient is φ = 13259638656.

The previous prime is 28000016383. The next prime is 28000016449. The reversal of 28000016444 is 44461000082.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000016449) 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 7 ways as a sum of consecutive naturals, for example, 250664 + ... + 344720.

It is an arithmetic number, because the mean of its divisors is an integer number (2149695590).

Almost surely, 2^28000016444 is an apocalyptic number.

It is an amenable number.

28000016444 is a deficient number, since it is larger than the sum of its proper divisors (23592677716).

28000016444 is a wasteful number, since it uses less digits than its factorization.

28000016444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97997 (or 97995 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The spelling of 28000016444 in words is "twenty-eight billion, sixteen thousand, four hundred forty-four".