13655978 has 8 divisors (see below), whose sum is σ = 23410272. Its totient is φ = 5852556.

The previous prime is 13655959. The next prime is 13655989. The reversal of 13655978 is 87955631.

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

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, 487700 + ... + 487727.

It is an arithmetic number, because the mean of its divisors is an integer number (2926284).

Almost surely, 2^13655978 is an apocalyptic number.

13655978 is a deficient number, since it is larger than the sum of its proper divisors (9754294).

13655978 is an equidigital number, since it uses as much as digits as its factorization.

13655978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975436.

The product of its digits is 226800, while the sum is 44.

The square root of 13655978 is about 3695.3995724414. The cubic root of 13655978 is about 239.0236842130.

The spelling of 13655978 in words is "thirteen million, six hundred fifty-five thousand, nine hundred seventy-eight".