542442420 has 240 divisors, whose sum is σ = 1878307200. Its totient is φ = 130201344.

The previous prime is 542442391. The next prime is 542442421. The reversal of 542442420 is 24244245.

542442420 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (542442421) 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 79 ways as a sum of consecutive naturals, for example, 905281 + ... + 905879.

It is an arithmetic number, because the mean of its divisors is an integer number (7826280).

Almost surely, 2^542442420 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 542442420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939153600).

542442420 is an abundant number, since it is smaller than the sum of its proper divisors (1335864780).

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

542442420 is a wasteful number, since it uses less digits than its factorization.

542442420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 542442420 is about 23290.3932985255. The cubic root of 542442420 is about 815.5511696944.

Adding to 542442420 its reverse (24244245), we get a palindrome (566686665).

The spelling of 542442420 in words is "five hundred forty-two million, four hundred forty-two thousand, four hundred twenty".