28084424 has 8 divisors (see below), whose sum is σ = 52658310. Its totient is φ = 14042208.

The previous prime is 28084423. The next prime is 28084429. The reversal of 28084424 is 42448082.

It can be written as a sum of positive squares in only one way, i.e., 27899524 + 184900 = 5282^2 + 430^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (28084423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1755269 + ... + 1755284.

Almost surely, 2^28084424 is an apocalyptic number.

It is an amenable number.

28084424 is a deficient number, since it is larger than the sum of its proper divisors (24573886).

28084424 is a wasteful number, since it uses less digits than its factorization.

28084424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510559 (or 3510555 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 28084424 is about 5299.4739361563. The cubic root of 28084424 is about 303.9637826198.

The spelling of 28084424 in words is "twenty-eight million, eighty-four thousand, four hundred twenty-four".