542440 has 32 divisors (see below), whose sum is σ = 1244160. Its totient is φ = 212800.

The previous prime is 542401. The next prime is 542441. The reversal of 542440 is 44245.

It is not an unprimeable number, because it can be changed into a prime (542441) 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, 2745 + ... + 2935.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2⁵⁴²⁴⁴⁰ 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 542440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (622080).

542440 is an abundant number, since it is smaller than the sum of its proper divisors (701720).

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

542440 is a wasteful number, since it uses less digits than its factorization.

542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 542440 is about 736.5052613526. The cubic root of 542440 is about 81.5549956886.

Adding to 542440 its reverse (44245), we get a palindrome (586685).

The spelling of 542440 in words is "five hundred forty-two thousand, four hundred forty".