13991742 has 24 divisors (see below), whose sum is σ = 31056480. Its totient is φ = 4549920.

The previous prime is 13991741. The next prime is 13991749. The reversal of 13991742 is 24719931.

It is a junction number, because it is equal to n+sod(n) for n = 13991697 and 13991706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8742 + ... + 10217.

It is an arithmetic number, because the mean of its divisors is an integer number (1294020).

Almost surely, 2^13991742 is an apocalyptic number.

13991742 is an abundant number, since it is smaller than the sum of its proper divisors (17064738).

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

13991742 is a wasteful number, since it uses less digits than its factorization.

13991742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19008 (or 19005 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 13991742 is about 3740.5537023280. The cubic root of 13991742 is about 240.9668291094.

The spelling of 13991742 in words is "thirteen million, nine hundred ninety-one thousand, seven hundred forty-two".