28088444 has 12 divisors (see below), whose sum is σ = 50353968. Its totient is φ = 13701600.

The previous prime is 28088413. The next prime is 28088447. The reversal of 28088444 is 44488082.

It is a super-2 number, since 2×28088444² = 1577921372682272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28088398 and 28088407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28088447) 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 3 ways as a sum of consecutive naturals, for example, 85472 + ... + 85799.

It is an arithmetic number, because the mean of its divisors is an integer number (4196164).

Almost surely, 2^28088444 is an apocalyptic number.

It is an amenable number.

28088444 is a deficient number, since it is larger than the sum of its proper divisors (22265524).

28088444 is a wasteful number, since it uses less digits than its factorization.

28088444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171316 (or 171314 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The square root of 28088444 is about 5299.8532055143. The cubic root of 28088444 is about 303.9782850371.

The spelling of 28088444 in words is "twenty-eight million, eighty-eight thousand, four hundred forty-four".