242420420 has 48 divisors (see below), whose sum is σ = 556428096. Its totient is φ = 87984000.

The previous prime is 242420419. The next prime is 242420441. The reversal of 242420420 is 24024242.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 242420392 and 242420401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206435 + ... + 207605.

It is an arithmetic number, because the mean of its divisors is an integer number (11592252).

Almost surely, 2^242420420 is an apocalyptic number.

242420420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242420420 is an abundant number, since it is smaller than the sum of its proper divisors (314007676).

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

242420420 is a wasteful number, since it uses less digits than its factorization.

242420420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132 (or 2130 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 242420420 is about 15569.8561329256. The cubic root of 242420420 is about 623.5286305667.

Adding to 242420420 its reverse (24024242), we get a palindrome (266444662).

The spelling of 242420420 in words is "two hundred forty-two million, four hundred twenty thousand, four hundred twenty".