28432771 has 8 divisors (see below), whose sum is σ = 28998144. Its totient is φ = 27870720.

The previous prime is 28432753. The next prime is 28432777. The reversal of 28432771 is 17723482.

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 28432771 - 2⁵ = 28432739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28432777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22755 + ... + 23971.

It is an arithmetic number, because the mean of its divisors is an integer number (3624768).

Almost surely, 2^28432771 is an apocalyptic number.

28432771 is a deficient number, since it is larger than the sum of its proper divisors (565373).

28432771 is a wasteful number, since it uses less digits than its factorization.

28432771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661.

The product of its digits is 18816, while the sum is 34.

The square root of 28432771 is about 5332.2388356112. The cubic root of 28432771 is about 305.2153670146.

The spelling of 28432771 in words is "twenty-eight million, four hundred thirty-two thousand, seven hundred seventy-one".