2688469 has 4 divisors (see below), whose sum is σ = 3072544. Its totient is φ = 2304396.

The previous prime is 2688467. The next prime is 2688473. The reversal of 2688469 is 9648862.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2688469 - 2¹ = 2688467 is a prime.

It is a super-2 number, since 2×2688469² = 14455731127922, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 6² + 8³ + 8⁷ + 4⁸ + 6³ + 9³ .

It is a Duffinian number.

2688469 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2688467) 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, 192027 + ... + 192040.

It is an arithmetic number, because the mean of its divisors is an integer number (768136).

2^2688469 is an apocalyptic number.

It is an amenable number.

2688469 is a deficient number, since it is larger than the sum of its proper divisors (384075).

2688469 is an equidigital number, since it uses as much as digits as its factorization.

2688469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384074.

The product of its digits is 165888, while the sum is 43.

The square root of 2688469 is about 1639.6551466696. The cubic root of 2688469 is about 139.0491519150.

The spelling of 2688469 in words is "two million, six hundred eighty-eight thousand, four hundred sixty-nine".