28180318 has 8 divisors (see below), whose sum is σ = 42423912. Its totient is φ = 14039016.

The previous prime is 28180309. The next prime is 28180319. The reversal of 28180318 is 81308182.

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

It is a super-2 number, since 2×28180318² = 1588260645162248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28180318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28180319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24880 + ... + 25987.

It is an arithmetic number, because the mean of its divisors is an integer number (5302989).

Almost surely, 2^28180318 is an apocalyptic number.

28180318 is a deficient number, since it is larger than the sum of its proper divisors (14243594).

28180318 is a wasteful number, since it uses less digits than its factorization.

28180318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51146.

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 28180318 is about 5308.5137279657. The cubic root of 28180318 is about 304.3093500920.

The spelling of 28180318 in words is "twenty-eight million, one hundred eighty thousand, three hundred eighteen".