14388978 has 16 divisors (see below), whose sum is σ = 28839456. Its totient is φ = 4786080.

The previous prime is 14388943. The next prime is 14388989. The reversal of 14388978 is 87988341.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 825 + ... + 5427.

It is an arithmetic number, because the mean of its divisors is an integer number (1802466).

Almost surely, 2^14388978 is an apocalyptic number.

14388978 is an abundant number, since it is smaller than the sum of its proper divisors (14450478).

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

14388978 is a wasteful number, since it uses less digits than its factorization.

14388978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129.

The product of its digits is 387072, while the sum is 48.

The square root of 14388978 is about 3793.2806381812. The cubic root of 14388978 is about 243.2259917288.

Subtracting from 14388978 its sum of digits (48), we obtain a triangular number (14388930 = T₅₃₆₄).

The spelling of 14388978 in words is "fourteen million, three hundred eighty-eight thousand, nine hundred seventy-eight".