13861855 has 24 divisors (see below), whose sum is σ = 20027520. Its totient is φ = 9172800.

The previous prime is 13861853. The next prime is 13861877. The reversal of 13861855 is 55816831.

It is not a de Polignac number, because 13861855 - 2¹ = 13861853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13861853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6130 + ... + 8080.

It is an arithmetic number, because the mean of its divisors is an integer number (834480).

Almost surely, 2^13861855 is an apocalyptic number.

13861855 is a deficient number, since it is larger than the sum of its proper divisors (6165665).

13861855 is a wasteful number, since it uses less digits than its factorization.

13861855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999 (or 1992 counting only the distinct ones).

The product of its digits is 28800, while the sum is 37.

The square root of 13861855 is about 3723.1512190616. The cubic root of 13861855 is about 240.2188686285.

The spelling of 13861855 in words is "thirteen million, eight hundred sixty-one thousand, eight hundred fifty-five".