28445422 has 4 divisors (see below), whose sum is σ = 42668136. Its totient is φ = 14222710.

The previous prime is 28445401. The next prime is 28445429. The reversal of 28445422 is 22454482.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28445429) by changing a digit.

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 as a sum of consecutive naturals, namely, 7111354 + ... + 7111357.

It is an arithmetic number, because the mean of its divisors is an integer number (10667034).

Almost surely, 2^28445422 is an apocalyptic number.

28445422 is a deficient number, since it is larger than the sum of its proper divisors (14222714).

28445422 is a wasteful number, since it uses less digits than its factorization.

28445422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14222713.

The product of its digits is 20480, while the sum is 31.

The square root of 28445422 is about 5333.4249783793. The cubic root of 28445422 is about 305.2606282505.

The spelling of 28445422 in words is "twenty-eight million, four hundred forty-five thousand, four hundred twenty-two".