13824505 has 4 divisors (see below), whose sum is σ = 16589412. Its totient is φ = 11059600.

The previous prime is 13824487. The next prime is 13824511. The reversal of 13824505 is 50542831.

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 1567504 + 12257001 = 1252^2 + 3501^2 .

It is not a de Polignac number, because 13824505 - 2²³ = 5435897 is a prime.

It is a super-2 number, since 2×13824505² = 382233876990050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382446 + ... + 1382455.

It is an arithmetic number, because the mean of its divisors is an integer number (4147353).

Almost surely, 2^13824505 is an apocalyptic number.

It is an amenable number.

13824505 is a deficient number, since it is larger than the sum of its proper divisors (2764907).

13824505 is an equidigital number, since it uses as much as digits as its factorization.

13824505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764906.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 13824505 is about 3718.1319234261. The cubic root of 13824505 is about 240.0029224181.

The spelling of 13824505 in words is "thirteen million, eight hundred twenty-four thousand, five hundred five".