2728469 has 4 divisors (see below), whose sum is σ = 2773260. Its totient is φ = 2683680.

The previous prime is 2728447. The next prime is 2728471. The reversal of 2728469 is 9648272.

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 940900 + 1787569 = 970^2 + 1337^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2728469 is a prime.

It is a super-2 number, since 2×2728469² = 14889086167922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2728409) 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, 22304 + ... + 22425.

It is an arithmetic number, because the mean of its divisors is an integer number (693315).

2^2728469 is an apocalyptic number.

It is an amenable number.

2728469 is a deficient number, since it is larger than the sum of its proper divisors (44791).

2728469 is an equidigital number, since it uses as much as digits as its factorization.

2728469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44790.

The product of its digits is 48384, while the sum is 38.

The square root of 2728469 is about 1651.8077975358. The cubic root of 2728469 is about 139.7353674450.

The spelling of 2728469 in words is "two million, seven hundred twenty-eight thousand, four hundred sixty-nine".