28189360 has 20 divisors (see below), whose sum is σ = 65540448. Its totient is φ = 11275712.

The previous prime is 28189309. The next prime is 28189393. The reversal of 28189360 is 6398182.

It is a tau number, because it is divible by the number of its divisors (20).

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 3 ways as a sum of consecutive naturals, for example, 176104 + ... + 176263.

Almost surely, 2^28189360 is an apocalyptic number.

28189360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28189360 is an abundant number, since it is smaller than the sum of its proper divisors (37351088).

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

28189360 is a wasteful number, since it uses less digits than its factorization.

28189360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352380 (or 352374 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28189360 is about 5309.3653104679. The cubic root of 28189360 is about 304.3418937383.

The spelling of 28189360 in words is "twenty-eight million, one hundred eighty-nine thousand, three hundred sixty".