28022732 has 12 divisors (see below), whose sum is σ = 51924600. Its totient is φ = 13187136.

The previous prime is 28022711. The next prime is 28022737. The reversal of 28022732 is 23722082.

It is not an unprimeable number, because it can be changed into a prime (28022737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205982 + ... + 206117.

It is an arithmetic number, because the mean of its divisors is an integer number (4327050).

Almost surely, 2^28022732 is an apocalyptic number.

It is an amenable number.

28022732 is a deficient number, since it is larger than the sum of its proper divisors (23901868).

28022732 is a wasteful number, since it uses less digits than its factorization.

28022732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412120 (or 412118 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 28022732 is about 5293.6501584445. The cubic root of 28022732 is about 303.7410508408.

The spelling of 28022732 in words is "twenty-eight million, twenty-two thousand, seven hundred thirty-two".