28179642 has 32 divisors (see below), whose sum is σ = 59906304. Its totient is φ = 8806400.

The previous prime is 28179631. The next prime is 28179643. The reversal of 28179642 is 24697182.

It is a self number, because there is not a number n which added to its sum of digits gives 28179642.

It is not an unprimeable number, because it can be changed into a prime (28179643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43642 + ... + 44282.

It is an arithmetic number, because the mean of its divisors is an integer number (1872072).

Almost surely, 2^28179642 is an apocalyptic number.

28179642 is an abundant number, since it is smaller than the sum of its proper divisors (31726662).

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

28179642 is a wasteful number, since it uses less digits than its factorization.

28179642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094.

The product of its digits is 48384, while the sum is 39.

The square root of 28179642 is about 5308.4500562782. The cubic root of 28179642 is about 304.3069167770.

The spelling of 28179642 in words is "twenty-eight million, one hundred seventy-nine thousand, six hundred forty-two".