240069138 has 32 divisors (see below), whose sum is σ = 519208704. Its totient is φ = 73711872.

The previous prime is 240069127. The next prime is 240069139. The reversal of 240069138 is 831960042.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 240069099 and 240069108.

It is not an unprimeable number, because it can be changed into a prime (240069139) by changing a digit.

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, 20245 + ... + 29832.

It is an arithmetic number, because the mean of its divisors is an integer number (16225272).

Almost surely, 2^240069138 is an apocalyptic number.

240069138 is an abundant number, since it is smaller than the sum of its proper divisors (279139566).

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

240069138 is a wasteful number, since it uses less digits than its factorization.

240069138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50146.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 240069138 is about 15494.1646435037. The cubic root of 240069138 is about 621.5061698617.

The spelling of 240069138 in words is "two hundred forty million, sixty-nine thousand, one hundred thirty-eight".