28404444 has 12 divisors (see below), whose sum is σ = 66277064. Its totient is φ = 9468144.

The previous prime is 28404407. The next prime is 28404451. The reversal of 28404444 is 44440482.

It is a tau number, because it is divible by the number of its divisors (12).

28404444 is a modest number, since divided by 4444 gives 2840 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1183507 + ... + 1183530.

Almost surely, 2^28404444 is an apocalyptic number.

It is an amenable number.

28404444 is an abundant number, since it is smaller than the sum of its proper divisors (37872620).

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

28404444 is a wasteful number, since it uses less digits than its factorization.

28404444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367044 (or 2367042 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 30.

The square root of 28404444 is about 5329.5819723502. The cubic root of 28404444 is about 305.1139733503.

The spelling of 28404444 in words is "twenty-eight million, four hundred four thousand, four hundred forty-four".