13969920 has 160 divisors (see below), whose sum is σ = 47729088. Its totient is φ = 3473408.

The previous prime is 13969913. The next prime is 13969927. The reversal of 13969920 is 2996931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13969913) and next prime (13969927).

It is a tau number, because it is divible by the number of its divisors (160).

It is not an unprimeable number, because it can be changed into a prime (13969927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130507 + ... + 130613.

Almost surely, 2^13969920 is an apocalyptic number.

13969920 is a gapful number since it is divisible by the number (10) 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 13969920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23864544).

13969920 is an abundant number, since it is smaller than the sum of its proper divisors (33759168).

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

13969920 is a wasteful number, since it uses less digits than its factorization.

13969920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 13969920 is about 3737.6356162687. The cubic root of 13969920 is about 240.8414905530.

The spelling of 13969920 in words is "thirteen million, nine hundred sixty-nine thousand, nine hundred twenty".