13613994 has 40 divisors (see below), whose sum is σ = 32118240. Its totient is φ = 4298184.

The previous prime is 13613993. The next prime is 13614001. The reversal of 13613994 is 49931631.

It is not an unprimeable number, because it can be changed into a prime (13613993) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 867 + ... + 5289.

It is an arithmetic number, because the mean of its divisors is an integer number (802956).

Almost surely, 2^13613994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13613994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16059120).

13613994 is an abundant number, since it is smaller than the sum of its proper divisors (18504246).

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

13613994 is a wasteful number, since it uses less digits than its factorization.

13613994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4456 (or 4447 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 13613994 is about 3689.7146231111. The cubic root of 13613994 is about 238.7784809275.

The spelling of 13613994 in words is "thirteen million, six hundred thirteen thousand, nine hundred ninety-four".