28424444 has 12 divisors (see below), whose sum is σ = 49782768. Its totient is φ = 14200800.

The previous prime is 28424441. The next prime is 28424453. The reversal of 28424444 is 44442482.

It is a self number, because there is not a number n which added to its sum of digits gives 28424444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28424441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5384 + ... + 9264.

It is an arithmetic number, because the mean of its divisors is an integer number (4148564).

Almost surely, 2^28424444 is an apocalyptic number.

It is an amenable number.

28424444 is a deficient number, since it is larger than the sum of its proper divisors (21358324).

28424444 is a wasteful number, since it uses less digits than its factorization.

28424444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5716 (or 5714 counting only the distinct ones).

The product of its digits is 32768, while the sum is 32.

The square root of 28424444 is about 5331.4579619462. The cubic root of 28424444 is about 305.1855683419.

The spelling of 28424444 in words is "twenty-eight million, four hundred twenty-four thousand, four hundred forty-four".