28693469 has 6 divisors (see below), whose sum is σ = 33378174. Its totient is φ = 24594360.

The previous prime is 28693459. The next prime is 28693493. The reversal of 28693469 is 96439682.

It can be written as a sum of positive squares in only one way, i.e., 15697444 + 12996025 = 3962^2 + 3605^2 .

It is not a de Polignac number, because 28693469 - 2¹⁶ = 28627933 is a prime.

It is a super-2 number, since 2×28693469² = 1646630326507922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28693409) 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 5 ways as a sum of consecutive naturals, for example, 292742 + ... + 292839.

It is an arithmetic number, because the mean of its divisors is an integer number (5563029).

Almost surely, 2^28693469 is an apocalyptic number.

It is an amenable number.

28693469 is a deficient number, since it is larger than the sum of its proper divisors (4684705).

28693469 is an equidigital number, since it uses as much as digits as its factorization.

28693469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585595 (or 585588 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 28693469 is about 5356.6285105465. The cubic root of 28693469 is about 306.1453628919.

The spelling of 28693469 in words is "twenty-eight million, six hundred ninety-three thousand, four hundred sixty-nine".