28955443 has 4 divisors (see below), whose sum is σ = 31587768. Its totient is φ = 26323120.

The previous prime is 28955441. The next prime is 28955467. The reversal of 28955443 is 34455982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28955443 - 2¹ = 28955441 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28955396 and 28955405.

It is not an unprimeable number, because it can be changed into a prime (28955441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316146 + ... + 1316167.

It is an arithmetic number, because the mean of its divisors is an integer number (7896942).

Almost surely, 2^28955443 is an apocalyptic number.

28955443 is a deficient number, since it is larger than the sum of its proper divisors (2632325).

28955443 is a wasteful number, since it uses less digits than its factorization.

28955443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632324.

The product of its digits is 172800, while the sum is 40.

The square root of 28955443 is about 5381.0262032441. The cubic root of 28955443 is about 307.0742533841.

It can be divided in two parts, 2895 and 5443, that added together give a palindrome (8338).

The spelling of 28955443 in words is "twenty-eight million, nine hundred fifty-five thousand, four hundred forty-three".