28180364 has 18 divisors (see below), whose sum is σ = 50964732. Its totient is φ = 13633800.

The previous prime is 28180357. The next prime is 28180367. The reversal of 28180364 is 46308182.

It is a self number, because there is not a number n which added to its sum of digits gives 28180364.

It is not an unprimeable number, because it can be changed into a prime (28180367) 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 5 ways as a sum of consecutive naturals, for example, 179 + ... + 7509.

It is an arithmetic number, because the mean of its divisors is an integer number (2831374).

Almost surely, 2^28180364 is an apocalyptic number.

It is an amenable number.

28180364 is a deficient number, since it is larger than the sum of its proper divisors (22784368).

28180364 is a wasteful number, since it uses less digits than its factorization.

28180364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7397 (or 7364 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28180364 is about 5308.5180606267. The cubic root of 28180364 is about 304.3095156711.

The spelling of 28180364 in words is "twenty-eight million, one hundred eighty thousand, three hundred sixty-four".