28180801 has 8 divisors (see below), whose sum is σ = 31132800. Its totient is φ = 25293840.

The previous prime is 28180787. The next prime is 28180807. The reversal of 28180801 is 10808182.

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

It is not a de Polignac number, because 28180801 - 2⁵ = 28180769 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28180801.

It is not an unprimeable number, because it can be changed into a prime (28180807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15346 + ... + 17083.

It is an arithmetic number, because the mean of its divisors is an integer number (3891600).

Almost surely, 2^28180801 is an apocalyptic number.

It is an amenable number.

28180801 is a deficient number, since it is larger than the sum of its proper divisors (2951999).

28180801 is a wasteful number, since it uses less digits than its factorization.

28180801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32519.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 28180801 is about 5308.5592207302. The cubic root of 28180801 is about 304.3110886644.

Adding to 28180801 its reverse (10808182), we get a palindrome (38988983).

The spelling of 28180801 in words is "twenty-eight million, one hundred eighty thousand, eight hundred one".