242440420 has 12 divisors (see below), whose sum is σ = 509124924. Its totient is φ = 96976160.

The previous prime is 242440369. The next prime is 242440459. The reversal of 242440420 is 24044242.

It can be written as a sum of positive squares in 2 ways, for example, as 61214976 + 181225444 = 7824^2 + 13462^2 .

It is a junction number, because it is equal to n+sod(n) for n = 242440391 and 242440400.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6060991 + ... + 6061030.

It is an arithmetic number, because the mean of its divisors is an integer number (42427077).

Almost surely, 2^242440420 is an apocalyptic number.

242440420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242440420 is an abundant number, since it is smaller than the sum of its proper divisors (266684504).

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

242440420 is a wasteful number, since it uses less digits than its factorization.

242440420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122030 (or 12122028 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 242440420 is about 15570.4983863716. The cubic root of 242440420 is about 623.5457774029.

Adding to 242440420 its reverse (24044242), we get a palindrome (266484662).

The spelling of 242440420 in words is "two hundred forty-two million, four hundred forty thousand, four hundred twenty".