13929912 has 72 divisors (see below), whose sum is σ = 39443040. Its totient is φ = 4436640.

The previous prime is 13929887. The next prime is 13929913. The reversal of 13929912 is 21992931.

It is a happy number.

13929912 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13929913) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 176289 + ... + 176367.

It is an arithmetic number, because the mean of its divisors is an integer number (547820).

Almost surely, 2^13929912 is an apocalyptic number.

13929912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13929912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19721520).

13929912 is an abundant number, since it is smaller than the sum of its proper divisors (25513128).

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

13929912 is a wasteful number, since it uses less digits than its factorization.

13929912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 115 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 13929912 is about 3732.2797322816. The cubic root of 13929912 is about 240.6113580167.

It can be divided in two parts, 13929 and 912, that added together give a palindrome (14841).

The spelling of 13929912 in words is "thirteen million, nine hundred twenty-nine thousand, nine hundred twelve".