13107978 has 72 divisors (see below), whose sum is σ = 31973760. Its totient is φ = 3875040.

The previous prime is 13107959. The next prime is 13108001. The reversal of 13107978 is 87970131.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 94233 + ... + 94371.

It is an arithmetic number, because the mean of its divisors is an integer number (444080).

Almost surely, 2^13107978 is an apocalyptic number.

13107978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13107978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15986880).

13107978 is an abundant number, since it is smaller than the sum of its proper divisors (18865782).

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

13107978 is a wasteful number, since it uses less digits than its factorization.

13107978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 13107978 is about 3620.4941651659. The cubic root of 13107978 is about 235.7826808215.

The spelling of 13107978 in words is "thirteen million, one hundred seven thousand, nine hundred seventy-eight".