13977740 has 72 divisors (see below), whose sum is σ = 36197280. Its totient is φ = 4505088.

The previous prime is 13977737. The next prime is 13977751. The reversal of 13977740 is 4777931.

It is a junction number, because it is equal to n+sod(n) for n = 13977694 and 13977703.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16241 + ... + 17079.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^13977740 is an apocalyptic number.

13977740 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 13977740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18098640).

13977740 is an abundant number, since it is smaller than the sum of its proper divisors (22219540).

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

13977740 is a wasteful number, since it uses less digits than its factorization.

13977740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 13977740 is about 3738.6815858000. The cubic root of 13977740 is about 240.8864211168.

The spelling of 13977740 in words is "thirteen million, nine hundred seventy-seven thousand, seven hundred forty".