28084408 has 32 divisors (see below), whose sum is σ = 60827760. Its totient is φ = 12014080.

The previous prime is 28084393. The next prime is 28084409. The reversal of 28084408 is 80448082.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7891 + ... + 10882.

Almost surely, 2^28084408 is an apocalyptic number.

It is an amenable number.

28084408 is an abundant number, since it is smaller than the sum of its proper divisors (32743352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28084408 is a wasteful number, since it uses less digits than its factorization.

28084408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18807 (or 18803 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 28084408 is about 5299.4724265723. The cubic root of 28084408 is about 303.9637248960.

The spelling of 28084408 in words is "twenty-eight million, eighty-four thousand, four hundred eight".