28448404 has 12 divisors (see below), whose sum is σ = 49909300. Its totient is φ = 14188608.

The previous prime is 28448369. The next prime is 28448417. The reversal of 28448404 is 40484482.

It can be written as a sum of positive squares in 2 ways, for example, as 22543504 + 5904900 = 4748^2 + 2430^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28448404.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7059 + ... + 10330.

Almost surely, 2^28448404 is an apocalyptic number.

It is an amenable number.

28448404 is a deficient number, since it is larger than the sum of its proper divisors (21460896).

28448404 is a wasteful number, since it uses less digits than its factorization.

28448404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17802 (or 17800 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 34.

The square root of 28448404 is about 5333.7045287492. The cubic root of 28448404 is about 305.2712949392.

The spelling of 28448404 in words is "twenty-eight million, four hundred forty-eight thousand, four hundred four".