426240 has 108 divisors (see below), whose sum is σ = 1514604. Its totient is φ = 110592.

The previous prime is 426233. The next prime is 426253. The reversal of 426240 is 42624.

426240 is a `hidden beast` number, since 42 + 624 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 278784 + 147456 = 528^2 + 384^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

426240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11502 + ... + 11538.

2⁴²⁶²⁴⁰ is an apocalyptic number.

426240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757302).

426240 is an abundant number, since it is smaller than the sum of its proper divisors (1088364).

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

426240 is a wasteful number, since it uses less digits than its factorization.

426240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 426240 is about 652.8705844193. The cubic root of 426240 is about 75.2577796470.

Adding to 426240 its product of nonzero digits (384), we get a palindrome (426624).

Adding to 426240 its reverse (42624), we get a palindrome (468864).

It can be divided in two parts, 426 and 240, that added together give a palindrome (666).

The spelling of 426240 in words is "four hundred twenty-six thousand, two hundred forty".