242538390 has 24 divisors (see below), whose sum is σ = 630600048. Its totient is φ = 64676880.

The previous prime is 242538349. The next prime is 242538391. The reversal of 242538390 is 93835242.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242538391) 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 11 ways as a sum of consecutive naturals, for example, 1347346 + ... + 1347525.

It is an arithmetic number, because the mean of its divisors is an integer number (26275002).

Almost surely, 2^242538390 is an apocalyptic number.

242538390 is an abundant number, since it is smaller than the sum of its proper divisors (388061658).

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

242538390 is a wasteful number, since it uses less digits than its factorization.

242538390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694884 (or 2694881 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 242538390 is about 15573.6440822307. The cubic root of 242538390 is about 623.6297575591.

The spelling of 242538390 in words is "two hundred forty-two million, five hundred thirty-eight thousand, three hundred ninety".