28986445 has 8 divisors (see below), whose sum is σ = 36829944. Its totient is φ = 21825024.

The previous prime is 28986427. The next prime is 28986449. The reversal of 28986445 is 54468982.

It can be written as a sum of positive squares in 4 ways, for example, as 12938409 + 16048036 = 3597^2 + 4006^2 .

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 28986445 - 2⁷ = 28986317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28986395 and 28986404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28986449) 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, 170424 + ... + 170593.

It is an arithmetic number, because the mean of its divisors is an integer number (4603743).

Almost surely, 2^28986445 is an apocalyptic number.

It is an amenable number.

28986445 is a deficient number, since it is larger than the sum of its proper divisors (7843499).

28986445 is a wasteful number, since it uses less digits than its factorization.

28986445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341039.

The product of its digits is 552960, while the sum is 46.

The square root of 28986445 is about 5383.9061098797. The cubic root of 28986445 is about 307.1838069999.

The spelling of 28986445 in words is "twenty-eight million, nine hundred eighty-six thousand, four hundred forty-five".