13878306 has 48 divisors (see below), whose sum is σ = 32707584. Its totient is φ = 4227552.

The previous prime is 13878287. The next prime is 13878311. The reversal of 13878306 is 60387831.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29485 + ... + 29951.

It is an arithmetic number, because the mean of its divisors is an integer number (681408).

Almost surely, 2^13878306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13878306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16353792).

13878306 is an abundant number, since it is smaller than the sum of its proper divisors (18829278).

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

13878306 is a wasteful number, since it uses less digits than its factorization.

13878306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13878306 is about 3725.3598483905. The cubic root of 13878306 is about 240.3138602035.

The spelling of 13878306 in words is "thirteen million, eight hundred seventy-eight thousand, three hundred six".