140668238 has 8 divisors (see below), whose sum is σ = 213373440. Its totient is φ = 69543760.

The previous prime is 140668223. The next prime is 140668247. The reversal of 140668238 is 832866041.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 394958 + ... + 395313.

It is an arithmetic number, because the mean of its divisors is an integer number (26671680).

Almost surely, 2^140668238 is an apocalyptic number.

140668238 is a deficient number, since it is larger than the sum of its proper divisors (72705202).

140668238 is an equidigital number, since it uses as much as digits as its factorization.

140668238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790362.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 140668238 is about 11860.3641596706. The cubic root of 140668238 is about 520.0742472878.

The spelling of 140668238 in words is "one hundred forty million, six hundred sixty-eight thousand, two hundred thirty-eight".