13896978 has 32 divisors (see below), whose sum is σ = 29056320. Its totient is φ = 4426560.

The previous prime is 13896943. The next prime is 13896979. The reversal of 13896978 is 87969831.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13896978.

It is not an unprimeable number, because it can be changed into a prime (13896979) 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, 12568 + ... + 13628.

It is an arithmetic number, because the mean of its divisors is an integer number (908010).

Almost surely, 2^13896978 is an apocalyptic number.

13896978 is an abundant number, since it is smaller than the sum of its proper divisors (15159342).

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

13896978 is a wasteful number, since it uses less digits than its factorization.

13896978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162.

The product of its digits is 653184, while the sum is 51.

The square root of 13896978 is about 3727.8650726656. The cubic root of 13896978 is about 240.4215853959.

The spelling of 13896978 in words is "thirteen million, eight hundred ninety-six thousand, nine hundred seventy-eight".