13889478 has 16 divisors (see below), whose sum is σ = 27941616. Its totient is φ = 4602720.

The previous prime is 13889461. The next prime is 13889483. The reversal of 13889478 is 87498831.

It is a super-2 number, since 2×13889478² = 385835198224968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5653 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (1746351).

Almost surely, 2^13889478 is an apocalyptic number.

13889478 is an abundant number, since it is smaller than the sum of its proper divisors (14052138).

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

13889478 is a wasteful number, since it uses less digits than its factorization.

13889478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13559.

The product of its digits is 387072, while the sum is 48.

The square root of 13889478 is about 3726.8589992110. The cubic root of 13889478 is about 240.3783269175.

The spelling of 13889478 in words is "thirteen million, eight hundred eighty-nine thousand, four hundred seventy-eight".