28447922 has 8 divisors (see below), whose sum is σ = 42895872. Its totient is φ = 14149300.

The previous prime is 28447907. The next prime is 28447957. The reversal of 28447922 is 22974482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28447922² = 1618568532236168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36854 + ... + 37617.

It is an arithmetic number, because the mean of its divisors is an integer number (5361984).

Almost surely, 2^28447922 is an apocalyptic number.

28447922 is a deficient number, since it is larger than the sum of its proper divisors (14447950).

28447922 is a wasteful number, since it uses less digits than its factorization.

28447922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74664.

The product of its digits is 64512, while the sum is 38.

The square root of 28447922 is about 5333.6593442026. The cubic root of 28447922 is about 305.2695708637.

The spelling of 28447922 in words is "twenty-eight million, four hundred forty-seven thousand, nine hundred twenty-two".