242040440 has 64 divisors (see below), whose sum is σ = 554692320. Its totient is φ = 95040000.

The previous prime is 242040439. The next prime is 242040499. The reversal of 242040440 is 44040242.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 731075 + ... + 731405.

Almost surely, 2^242040440 is an apocalyptic number.

242040440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

242040440 is an abundant number, since it is smaller than the sum of its proper divisors (312651880).

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

242040440 is a wasteful number, since it uses less digits than its factorization.

242040440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 620 counting only the distinct ones).

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

The square root of 242040440 is about 15557.6489226361. The cubic root of 242040440 is about 623.2026785045.

Adding to 242040440 its reverse (44040242), we get a palindrome (286080682).

The spelling of 242040440 in words is "two hundred forty-two million, forty thousand, four hundred forty".