14311978 has 8 divisors (see below), whose sum is σ = 22597920. Its totient is φ = 6779340.

The previous prime is 14311951. The next prime is 14311981. The reversal of 14311978 is 87911341.

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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188278 + ... + 188353.

It is an arithmetic number, because the mean of its divisors is an integer number (2824740).

Almost surely, 2^14311978 is an apocalyptic number.

14311978 is a deficient number, since it is larger than the sum of its proper divisors (8285942).

14311978 is a wasteful number, since it uses less digits than its factorization.

14311978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376652.

The product of its digits is 6048, while the sum is 34.

The square root of 14311978 is about 3783.1174975145. The cubic root of 14311978 is about 242.7913556194.

It can be divided in two parts, 143 and 11978, that added together give a palindrome (12121).

The spelling of 14311978 in words is "fourteen million, three hundred eleven thousand, nine hundred seventy-eight".