13966398 has 16 divisors (see below), whose sum is σ = 31036560. Its totient is φ = 4655448.

The previous prime is 13966391. The next prime is 13966409. The reversal of 13966398 is 89366931.

13966398 is a `hidden beast` number, since 1 + 3 + 9 + 6 + 639 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13966391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129265 + ... + 129372.

It is an arithmetic number, because the mean of its divisors is an integer number (1939785).

Almost surely, 2^13966398 is an apocalyptic number.

13966398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13966398 is an abundant number, since it is smaller than the sum of its proper divisors (17070162).

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

13966398 is a wasteful number, since it uses less digits than its factorization.

13966398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258648 (or 258642 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 13966398 is about 3737.1644330963. The cubic root of 13966398 is about 240.8212490860.

The spelling of 13966398 in words is "thirteen million, nine hundred sixty-six thousand, three hundred ninety-eight".