242070138 has 24 divisors (see below), whose sum is σ = 524784468. Its totient is φ = 80644032.

The previous prime is 242070119. The next prime is 242070139. The reversal of 242070138 is 831070242.

It can be written as a sum of positive squares in 2 ways, for example, as 180714249 + 61355889 = 13443^2 + 7833^2 .

It is a super-2 number, since 2×242070138² = 117195903422678088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (242070139) 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, 46356 + ... + 51312.

Almost surely, 2^242070138 is an apocalyptic number.

242070138 is an abundant number, since it is smaller than the sum of its proper divisors (282714330).

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

242070138 is a wasteful number, since it uses less digits than its factorization.

242070138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7678 (or 7675 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 242070138 is about 15558.6033434881. The cubic root of 242070138 is about 623.2281661410.

The spelling of 242070138 in words is "two hundred forty-two million, seventy thousand, one hundred thirty-eight".