140140138 has 8 divisors (see below), whose sum is σ = 211311360. Its totient is φ = 69703020.

The previous prime is 140140111. The next prime is 140140153. The reversal of 140140138 is 831041041.

140140138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183048 + ... + 183811.

It is an arithmetic number, because the mean of its divisors is an integer number (26413920).

Almost surely, 2^140140138 is an apocalyptic number.

140140138 is a deficient number, since it is larger than the sum of its proper divisors (71171222).

140140138 is a wasteful number, since it uses less digits than its factorization.

140140138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367052.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 140140138 is about 11838.0799963508. The cubic root of 140140138 is about 519.4226061563.

Adding to 140140138 its reverse (831041041), we get a palindrome (971181179).

The spelling of 140140138 in words is "one hundred forty million, one hundred forty thousand, one hundred thirty-eight".