13857812 has 6 divisors (see below), whose sum is σ = 24251178. Its totient is φ = 6928904.

The previous prime is 13857803. The next prime is 13857829. The reversal of 13857812 is 21875831.

It can be written as a sum of positive squares in only one way, i.e., 10523536 + 3334276 = 3244^2 + 1826^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1732223 + ... + 1732230.

It is an arithmetic number, because the mean of its divisors is an integer number (4041863).

Almost surely, 2^13857812 is an apocalyptic number.

It is an amenable number.

13857812 is a deficient number, since it is larger than the sum of its proper divisors (10393366).

13857812 is a wasteful number, since it uses less digits than its factorization.

13857812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464457 (or 3464455 counting only the distinct ones).

The product of its digits is 13440, while the sum is 35.

The square root of 13857812 is about 3722.6082254247. The cubic root of 13857812 is about 240.1955119825.

The spelling of 13857812 in words is "thirteen million, eight hundred fifty-seven thousand, eight hundred twelve".