28664142 has 32 divisors (see below), whose sum is σ = 65372832. Its totient is φ = 8300544.

The previous prime is 28664137. The next prime is 28664171. The reversal of 28664142 is 24146682.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 9483 + ... + 12134.

It is an arithmetic number, because the mean of its divisors is an integer number (2042901).

Almost surely, 2^28664142 is an apocalyptic number.

28664142 is an abundant number, since it is smaller than the sum of its proper divisors (36708690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28664142 is a wasteful number, since it uses less digits than its factorization.

28664142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21652.

The product of its digits is 18432, while the sum is 33.

The square root of 28664142 is about 5353.8903612233. The cubic root of 28664142 is about 306.0410257267.

The spelling of 28664142 in words is "twenty-eight million, six hundred sixty-four thousand, one hundred forty-two".