28189572 has 24 divisors (see below), whose sum is σ = 66057600. Its totient is φ = 9356256.

The previous prime is 28189543. The next prime is 28189583. The reversal of 28189572 is 27598182.

It is an unprimeable number.

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, 2047 + ... + 7782.

It is an arithmetic number, because the mean of its divisors is an integer number (2752400).

Almost surely, 2^28189572 is an apocalyptic number.

It is an amenable number.

28189572 is an abundant number, since it is smaller than the sum of its proper divisors (37868028).

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

28189572 is a wasteful number, since it uses less digits than its factorization.

28189572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10075 (or 10073 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 28189572 is about 5309.3852751519. The cubic root of 28189572 is about 304.3426566777.

The spelling of 28189572 in words is "twenty-eight million, one hundred eighty-nine thousand, five hundred seventy-two".