28144322 has 4 divisors (see below), whose sum is σ = 42216486. Its totient is φ = 14072160.

The previous prime is 28144289. The next prime is 28144331. The reversal of 28144322 is 22344182.

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

It can be written as a sum of positive squares in only one way, i.e., 27258841 + 885481 = 5221^2 + 941^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28144291 and 28144300.

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 as a sum of consecutive naturals, namely, 7036079 + ... + 7036082.

Almost surely, 2^28144322 is an apocalyptic number.

28144322 is a deficient number, since it is larger than the sum of its proper divisors (14072164).

28144322 is a wasteful number, since it uses less digits than its factorization.

28144322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072163.

The product of its digits is 3072, while the sum is 26.

The square root of 28144322 is about 5305.1222417584. The cubic root of 28144322 is about 304.1797255001.

The spelling of 28144322 in words is "twenty-eight million, one hundred forty-four thousand, three hundred twenty-two".