28472311 has 8 divisors (see below), whose sum is σ = 32952320. Its totient is φ = 24095448.

The previous prime is 28472303. The next prime is 28472329. The reversal of 28472311 is 11327482.

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

It is a cyclic number.

It is not a de Polignac number, because 28472311 - 2³ = 28472303 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 28472311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28472371) 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 7 ways as a sum of consecutive naturals, for example, 25191 + ... + 26296.

It is an arithmetic number, because the mean of its divisors is an integer number (4119040).

Almost surely, 2^28472311 is an apocalyptic number.

28472311 is a deficient number, since it is larger than the sum of its proper divisors (4480009).

28472311 is an equidigital number, since it uses as much as digits as its factorization.

28472311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51573.

The product of its digits is 2688, while the sum is 28.

The square root of 28472311 is about 5335.9451833766. The cubic root of 28472311 is about 305.3567839464.

Adding to 28472311 its reverse (11327482), we get a palindrome (39799793).

The spelling of 28472311 in words is "twenty-eight million, four hundred seventy-two thousand, three hundred eleven".