13939398 has 64 divisors (see below), whose sum is σ = 34928640. Its totient is φ = 4082400.

The previous prime is 13939391. The next prime is 13939411. The reversal of 13939398 is 89393931.

13939398 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (13939391) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18036 + ... + 18792.

It is an arithmetic number, because the mean of its divisors is an integer number (545760).

Almost surely, 2^13939398 is an apocalyptic number.

13939398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13939398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17464320).

13939398 is an abundant number, since it is smaller than the sum of its proper divisors (20989242).

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

13939398 is a wasteful number, since it uses less digits than its factorization.

13939398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810 (or 804 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 13939398 is about 3733.5503210751. The cubic root of 13939398 is about 240.6659628469.

The spelling of 13939398 in words is "thirteen million, nine hundred thirty-nine thousand, three hundred ninety-eight".