13998878 has 8 divisors (see below), whose sum is σ = 21073368. Its totient is φ = 6974424.

The previous prime is 13998847. The next prime is 13998883. The reversal of 13998878 is 87889931.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11801 + ... + 12932.

It is an arithmetic number, because the mean of its divisors is an integer number (2634171).

Almost surely, 2^13998878 is an apocalyptic number.

13998878 is a deficient number, since it is larger than the sum of its proper divisors (7074490).

13998878 is a wasteful number, since it uses less digits than its factorization.

13998878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25018.

The product of its digits is 870912, while the sum is 53.

The square root of 13998878 is about 3741.5074502131. The cubic root of 13998878 is about 241.0077877226.

The spelling of 13998878 in words is "thirteen million, nine hundred ninety-eight thousand, eight hundred seventy-eight".