140138508 has 12 divisors (see below), whose sum is σ = 326989880. Its totient is φ = 46712832.

The previous prime is 140138503. The next prime is 140138513. The reversal of 140138508 is 805831041.

It is an interprime number because it is at equal distance from previous prime (140138503) and next prime (140138513).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (140138503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5839093 + ... + 5839116.

Almost surely, 2^140138508 is an apocalyptic number.

It is an amenable number.

140138508 is an abundant number, since it is smaller than the sum of its proper divisors (186851372).

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

140138508 is a wasteful number, since it uses less digits than its factorization.

140138508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11678216 (or 11678214 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 140138508 is about 11838.0111505269. The cubic root of 140138508 is about 519.4205923099.

Adding to 140138508 its reverse (805831041), we get a palindrome (945969549).

The spelling of 140138508 in words is "one hundred forty million, one hundred thirty-eight thousand, five hundred eight".