28030044 has 24 divisors (see below), whose sum is σ = 74747008. Its totient is φ = 8008560.

The previous prime is 28030033. The next prime is 28030061. The reversal of 28030044 is 44003082.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 28030044.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166762 + ... + 166929.

Almost surely, 2^28030044 is an apocalyptic number.

It is an amenable number.

28030044 is an abundant number, since it is smaller than the sum of its proper divisors (46716964).

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

28030044 is a wasteful number, since it uses less digits than its factorization.

28030044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333705 (or 333703 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 28030044 is about 5294.3407521617. The cubic root of 28030044 is about 303.7674670306.

The spelling of 28030044 in words is "twenty-eight million, thirty thousand, forty-four".