13365978 has 32 divisors (see below), whose sum is σ = 28797120. Its totient is φ = 4120320.

The previous prime is 13365977. The next prime is 13365983. The reversal of 13365978 is 87956331.

It is not an unprimeable number, because it can be changed into a prime (13365973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4908 + ... + 7128.

It is an arithmetic number, because the mean of its divisors is an integer number (899910).

Almost surely, 2^13365978 is an apocalyptic number.

13365978 is an abundant number, since it is smaller than the sum of its proper divisors (15431142).

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

13365978 is a wasteful number, since it uses less digits than its factorization.

13365978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2302.

The product of its digits is 136080, while the sum is 42.

The square root of 13365978 is about 3655.9510390595. The cubic root of 13365978 is about 237.3195852372.

The spelling of 13365978 in words is "thirteen million, three hundred sixty-five thousand, nine hundred seventy-eight".