13971980 has 48 divisors (see below), whose sum is σ = 32810400. Its totient is φ = 4953600.

The previous prime is 13971959. The next prime is 13972003. The reversal of 13971980 is 8917931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8246 + ... + 9794.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^13971980 is an apocalyptic number.

13971980 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 13971980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16405200).

13971980 is an abundant number, since it is smaller than the sum of its proper divisors (18838420).

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

13971980 is a wasteful number, since it uses less digits than its factorization.

13971980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610 (or 1608 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 13971980 is about 3737.9111813953. The cubic root of 13971980 is about 240.8533281080.

The spelling of 13971980 in words is "thirteen million, nine hundred seventy-one thousand, nine hundred eighty".