28608722 has 16 divisors (see below), whose sum is σ = 46904832. Its totient is φ = 13028160.

The previous prime is 28608721. The next prime is 28608731. The reversal of 28608722 is 22780682.

It is a super-3 number, since 3×28608722³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28608721) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 12518 + ... + 14625.

It is an arithmetic number, because the mean of its divisors is an integer number (2931552).

Almost surely, 2^28608722 is an apocalyptic number.

28608722 is a deficient number, since it is larger than the sum of its proper divisors (18296110).

28608722 is a wasteful number, since it uses less digits than its factorization.

28608722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27193.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28608722 is about 5348.7121814508. The cubic root of 28608722 is about 305.8436625750.

The spelling of 28608722 in words is "twenty-eight million, six hundred eight thousand, seven hundred twenty-two".