28159746 has 8 divisors (see below), whose sum is σ = 56319504. Its totient is φ = 9386580.

The previous prime is 28159741. The next prime is 28159777. The reversal of 28159746 is 64795182.

It is a sphenic number, since it is the product of 3 distinct primes.

28159746 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28159698 and 28159707.

It is not an unprimeable number, because it can be changed into a prime (28159741) 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 in 3 ways as a sum of consecutive naturals, for example, 2346640 + ... + 2346651.

It is an arithmetic number, because the mean of its divisors is an integer number (7039938).

Almost surely, 2^28159746 is an apocalyptic number.

28159746 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28159746 is a wasteful number, since it uses less digits than its factorization.

28159746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4693296.

The product of its digits is 120960, while the sum is 42.

The square root of 28159746 is about 5306.5757320517. The cubic root of 28159746 is about 304.2352821329.

It can be divided in two parts, 2815 and 9746, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 28159746 in words is "twenty-eight million, one hundred fifty-nine thousand, seven hundred forty-six".