13969940 has 48 divisors (see below), whose sum is σ = 31281600. Its totient is φ = 5225472.

The previous prime is 13969927. The next prime is 13969973. The reversal of 13969940 is 4996931.

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, 36671 + ... + 37049.

It is an arithmetic number, because the mean of its divisors is an integer number (651700).

Almost surely, 2^13969940 is an apocalyptic number.

13969940 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 13969940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15640800).

13969940 is an abundant number, since it is smaller than the sum of its proper divisors (17311660).

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

13969940 is a wasteful number, since it uses less digits than its factorization.

13969940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 502 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 13969940 is about 3737.6382917559. The cubic root of 13969940 is about 240.8416054863.

The spelling of 13969940 in words is "thirteen million, nine hundred sixty-nine thousand, nine hundred forty".