28984465 has 4 divisors (see below), whose sum is σ = 34781364. Its totient is φ = 23187568.

The previous prime is 28984463. The next prime is 28984469. The reversal of 28984465 is 56448982.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8300161 + 20684304 = 2881^2 + 4548^2 .

It is a cyclic number.

It is not a de Polignac number, because 28984465 - 2¹ = 28984463 is a prime.

It is a super-2 number, since 2×28984465² = 1680198422672450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28984463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2898442 + ... + 2898451.

It is an arithmetic number, because the mean of its divisors is an integer number (8695341).

Almost surely, 2^28984465 is an apocalyptic number.

It is an amenable number.

28984465 is a deficient number, since it is larger than the sum of its proper divisors (5796899).

28984465 is an equidigital number, since it uses as much as digits as its factorization.

28984465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796898.

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

The square root of 28984465 is about 5383.7222253753. The cubic root of 28984465 is about 307.1768124916.

The spelling of 28984465 in words is "twenty-eight million, nine hundred eighty-four thousand, four hundred sixty-five".