13821672 has 16 divisors (see below), whose sum is σ = 34554240. Its totient is φ = 4607216.

The previous prime is 13821671. The next prime is 13821677. The reversal of 13821672 is 27612831.

It is not an unprimeable number, because it can be changed into a prime (13821671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287928 + ... + 287975.

It is an arithmetic number, because the mean of its divisors is an integer number (2159640).

Almost surely, 2^13821672 is an apocalyptic number.

13821672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13821672 is an abundant number, since it is smaller than the sum of its proper divisors (20732568).

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

13821672 is a wasteful number, since it uses less digits than its factorization.

13821672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575912 (or 575908 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 13821672 is about 3717.7509330239. The cubic root of 13821672 is about 239.9865270215.

The spelling of 13821672 in words is "thirteen million, eight hundred twenty-one thousand, six hundred seventy-two".