13993764 has 12 divisors (see below), whose sum is σ = 32652144. Its totient is φ = 4664584.

The previous prime is 13993757. The next prime is 13993769. The reversal of 13993764 is 46739931.

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

It is not an unprimeable number, because it can be changed into a prime (13993769) 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, 583062 + ... + 583085.

It is an arithmetic number, because the mean of its divisors is an integer number (2721012).

Almost surely, 2^13993764 is an apocalyptic number.

It is an amenable number.

13993764 is an abundant number, since it is smaller than the sum of its proper divisors (18658380).

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

13993764 is a wasteful number, since it uses less digits than its factorization.

13993764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166154 (or 1166152 counting only the distinct ones).

The product of its digits is 122472, while the sum is 42.

The square root of 13993764 is about 3740.8239734048. The cubic root of 13993764 is about 240.9784362288.

The spelling of 13993764 in words is "thirteen million, nine hundred ninety-three thousand, seven hundred sixty-four".