14278420 has 24 divisors (see below), whose sum is σ = 32291784. Its totient is φ = 5271936.

The previous prime is 14278417. The next prime is 14278421. The reversal of 14278420 is 2487241.

It can be written as a sum of positive squares in 4 ways, for example, as 35344 + 14243076 = 188^2 + 3774^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14278421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27199 + ... + 27718.

It is an arithmetic number, because the mean of its divisors is an integer number (1345491).

Almost surely, 2^14278420 is an apocalyptic number.

14278420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14278420 is an abundant number, since it is smaller than the sum of its proper divisors (18013364).

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

14278420 is a wasteful number, since it uses less digits than its factorization.

14278420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54939 (or 54937 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 14278420 is about 3778.6796635862. The cubic root of 14278420 is about 242.6014454933.

The spelling of 14278420 in words is "fourteen million, two hundred seventy-eight thousand, four hundred twenty".