28366577444 has 12 divisors (see below), whose sum is σ = 49648867968. Its totient is φ = 14181186600.

The previous prime is 28366577443. The next prime is 28366577453. The reversal of 28366577444 is 44477566382.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28366577444.

It is not an unprimeable number, because it can be changed into a prime (28366577443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494972 + ... + 549299.

It is an arithmetic number, because the mean of its divisors is an integer number (4137405664).

Almost surely, 2^28366577444 is an apocalyptic number.

It is an amenable number.

28366577444 is a deficient number, since it is larger than the sum of its proper divisors (21282290524).

28366577444 is a wasteful number, since it uses less digits than its factorization.

28366577444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051066 (or 1051064 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 56.

The spelling of 28366577444 in words is "twenty-eight billion, three hundred sixty-six million, five hundred seventy-seven thousand, four hundred forty-four".