28146722 has 4 divisors (see below), whose sum is σ = 42220086. Its totient is φ = 14073360.

The previous prime is 28146721. The next prime is 28146731. The reversal of 28146722 is 22764182.

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., 23222761 + 4923961 = 4819^2 + 2219^2 .

It is not an unprimeable number, because it can be changed into a prime (28146721) 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, 7036679 + ... + 7036682.

Almost surely, 2^28146722 is an apocalyptic number.

28146722 is a deficient number, since it is larger than the sum of its proper divisors (14073364).

28146722 is a wasteful number, since it uses less digits than its factorization.

28146722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14073363.

The product of its digits is 10752, while the sum is 32.

The square root of 28146722 is about 5305.3484334207. The cubic root of 28146722 is about 304.1883715376.

The spelling of 28146722 in words is "twenty-eight million, one hundred forty-six thousand, seven hundred twenty-two".