28180382 has 24 divisors (see below), whose sum is σ = 46579536. Its totient is φ = 12760704.

The previous prime is 28180381. The next prime is 28180387. The reversal of 28180382 is 28308182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28180381) 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 11 ways as a sum of consecutive naturals, for example, 15758 + ... + 17454.

It is an arithmetic number, because the mean of its divisors is an integer number (1940814).

Almost surely, 2^28180382 is an apocalyptic number.

28180382 is a deficient number, since it is larger than the sum of its proper divisors (18399154).

28180382 is a wasteful number, since it uses less digits than its factorization.

28180382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760 (or 1741 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 28180382 is about 5308.5197560149. The cubic root of 28180382 is about 304.3095804630.

The spelling of 28180382 in words is "twenty-eight million, one hundred eighty thousand, three hundred eighty-two".