28432444 has 12 divisors (see below), whose sum is σ = 49934584. Its totient is φ = 14165424.

The previous prime is 28432421. The next prime is 28432471. The reversal of 28432444 is 44423482.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11427 + ... + 13690.

Almost surely, 2^28432444 is an apocalyptic number.

It is an amenable number.

28432444 is a deficient number, since it is larger than the sum of its proper divisors (21502140).

28432444 is a wasteful number, since it uses less digits than its factorization.

28432444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25404 (or 25402 counting only the distinct ones).

The product of its digits is 24576, while the sum is 31.

The square root of 28432444 is about 5332.2081729805. The cubic root of 28432444 is about 305.2141969351.

The spelling of 28432444 in words is "twenty-eight million, four hundred thirty-two thousand, four hundred forty-four".