13807828 has 12 divisors (see below), whose sum is σ = 24997140. Its totient is φ = 6665792.

The previous prime is 13807823. The next prime is 13807831. The reversal of 13807828 is 82870831.

It can be written as a sum of positive squares in 2 ways, for example, as 8133904 + 5673924 = 2852^2 + 2382^2 .

It is a super-2 number, since 2×13807828² = 381312228155168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13807823) 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, 59401 + ... + 59632.

It is an arithmetic number, because the mean of its divisors is an integer number (2083095).

Almost surely, 2^13807828 is an apocalyptic number.

It is an amenable number.

13807828 is a deficient number, since it is larger than the sum of its proper divisors (11189312).

13807828 is a wasteful number, since it uses less digits than its factorization.

13807828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119066 (or 119064 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 13807828 is about 3715.8885882114. Note that the first 3 decimals coincide. The cubic root of 13807828 is about 239.9063755187.

The spelling of 13807828 in words is "thirteen million, eight hundred seven thousand, eight hundred twenty-eight".