424278 has 32 divisors (see below), whose sum is σ = 964320. Its totient is φ = 139968.

The previous prime is 424273. The next prime is 424313. The reversal of 424278 is 872424.

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

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424271) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 4326 + ... + 4422.

It is an arithmetic number, because the mean of its divisors is an integer number (30135).

2⁴²⁴²⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 424278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (482160).

424278 is an abundant number, since it is smaller than the sum of its proper divisors (540042).

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

424278 is an frugal number, since it uses more digits than its factorization.

424278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 102 counting only the distinct ones).

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

The square root of 424278 is about 651.3662564180. The cubic root of 424278 is about 75.1421304822.

The spelling of 424278 in words is "four hundred twenty-four thousand, two hundred seventy-eight".