13881738 has 32 divisors (see below), whose sum is σ = 30868992. Its totient is φ = 4132800.

The previous prime is 13881737. The next prime is 13881757. The reversal of 13881738 is 83718831.

13881738 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 Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 13881696 and 13881705.

It is not an unprimeable number, because it can be changed into a prime (13881737) 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, 453 + ... + 5288.

It is an arithmetic number, because the mean of its divisors is an integer number (964656).

Almost surely, 2^13881738 is an apocalyptic number.

13881738 is an abundant number, since it is smaller than the sum of its proper divisors (16987254).

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

13881738 is a wasteful number, since it uses less digits than its factorization.

13881738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5790.

The product of its digits is 32256, while the sum is 39.

The square root of 13881738 is about 3725.8204465594. The cubic root of 13881738 is about 240.3336678369. Note that the first 3 decimals are identical.

The spelling of 13881738 in words is "thirteen million, eight hundred eighty-one thousand, seven hundred thirty-eight".