28550444 has 24 divisors (see below), whose sum is σ = 53952528. Its totient is φ = 13141440.

The previous prime is 28550393. The next prime is 28550447. The reversal of 28550444 is 44405582.

It is a self number, because there is not a number n which added to its sum of digits gives 28550444.

It is not an unprimeable number, because it can be changed into a prime (28550447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34799 + ... + 35609.

It is an arithmetic number, because the mean of its divisors is an integer number (2248022).

Almost surely, 2^28550444 is an apocalyptic number.

It is an amenable number.

28550444 is a deficient number, since it is larger than the sum of its proper divisors (25402084).

28550444 is a wasteful number, since it uses less digits than its factorization.

28550444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505 (or 1503 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

The square root of 28550444 is about 5343.2615507759. The cubic root of 28550444 is about 305.6358463064.

The spelling of 28550444 in words is "twenty-eight million, five hundred fifty thousand, four hundred forty-four".