13835978 has 8 divisors (see below), whose sum is σ = 22350468. Its totient is φ = 6385824.

The previous prime is 13835953. The next prime is 13835989. The reversal of 13835978 is 87953831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11950849 + 1885129 = 3457^2 + 1373^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266051 + ... + 266102.

Almost surely, 2^13835978 is an apocalyptic number.

13835978 is a deficient number, since it is larger than the sum of its proper divisors (8514490).

13835978 is a wasteful number, since it uses less digits than its factorization.

13835978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532168.

The product of its digits is 181440, while the sum is 44.

The square root of 13835978 is about 3719.6744481204. The cubic root of 13835978 is about 240.0692971190.

The spelling of 13835978 in words is "thirteen million, eight hundred thirty-five thousand, nine hundred seventy-eight".