13978334 has 8 divisors (see below), whose sum is σ = 21643968. Its totient is φ = 6763680.

The previous prime is 13978313. The next prime is 13978337. The reversal of 13978334 is 43387931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13978337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112667 + ... + 112790.

It is an arithmetic number, because the mean of its divisors is an integer number (2705496).

Almost surely, 2^13978334 is an apocalyptic number.

13978334 is a deficient number, since it is larger than the sum of its proper divisors (7665634).

13978334 is a wasteful number, since it uses less digits than its factorization.

13978334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225490.

The product of its digits is 54432, while the sum is 38.

The square root of 13978334 is about 3738.7610247246. The cubic root of 13978334 is about 240.8898333161.

The spelling of 13978334 in words is "thirteen million, nine hundred seventy-eight thousand, three hundred thirty-four".