4278420 has 120 divisors (see below), whose sum is σ = 14229600. Its totient is φ = 1073088.

The previous prime is 4278413. The next prime is 4278431. The reversal of 4278420 is 248724.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30711 + ... + 30849.

It is an arithmetic number, because the mean of its divisors is an integer number (118580).

Almost surely, 2^4278420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4278420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7114800).

4278420 is an abundant number, since it is smaller than the sum of its proper divisors (9951180).

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

4278420 is a wasteful number, since it uses less digits than its factorization.

4278420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 4278420 is about 2068.4341903962. The cubic root of 4278420 is about 162.3408461467.

The spelling of 4278420 in words is "four million, two hundred seventy-eight thousand, four hundred twenty".