242635638 has 32 divisors (see below), whose sum is σ = 556058880. Its totient is φ = 69141600.

The previous prime is 242635637. The next prime is 242635651. The reversal of 242635638 is 836536242.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242635596 and 242635605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242635637) by changing a digit.

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, 8913 + ... + 23763.

It is an arithmetic number, because the mean of its divisors is an integer number (17376840).

Almost surely, 2^242635638 is an apocalyptic number.

242635638 is an abundant number, since it is smaller than the sum of its proper divisors (313423242).

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

242635638 is a wasteful number, since it uses less digits than its factorization.

242635638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252.

The product of its digits is 207360, while the sum is 39.

The square root of 242635638 is about 15576.7659672989. The cubic root of 242635638 is about 623.7130964522.

The spelling of 242635638 in words is "two hundred forty-two million, six hundred thirty-five thousand, six hundred thirty-eight".