13857828 has 12 divisors (see below), whose sum is σ = 32334960. Its totient is φ = 4619272.

The previous prime is 13857803. The next prime is 13857829. The reversal of 13857828 is 82875831.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 13857828.

It is not an unprimeable number, because it can be changed into a prime (13857829) 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, 577398 + ... + 577421.

It is an arithmetic number, because the mean of its divisors is an integer number (2694580).

Almost surely, 2^13857828 is an apocalyptic number.

It is an amenable number.

13857828 is an abundant number, since it is smaller than the sum of its proper divisors (18477132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13857828 is a wasteful number, since it uses less digits than its factorization.

13857828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154826 (or 1154824 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 13857828 is about 3722.6103744550. The cubic root of 13857828 is about 240.1956044244.

The spelling of 13857828 in words is "thirteen million, eight hundred fifty-seven thousand, eight hundred twenty-eight".