140403938 has 8 divisors (see below), whose sum is σ = 212691420. Its totient is φ = 69506800.

The previous prime is 140403931. The next prime is 140403971. The reversal of 140403938 is 839304041.

It can be written as a sum of positive squares in 2 ways, for example, as 137898049 + 2505889 = 11743^2 + 1583^2 .

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

It is not an unprimeable number, because it can be changed into a prime (140403931) 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 3 ways as a sum of consecutive naturals, for example, 347333 + ... + 347736.

Almost surely, 2^140403938 is an apocalyptic number.

140403938 is a deficient number, since it is larger than the sum of its proper divisors (72287482).

140403938 is a wasteful number, since it uses less digits than its factorization.

140403938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695172.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 140403938 is about 11849.2167673648. The cubic root of 140403938 is about 519.7483224890.

Adding to 140403938 its reverse (839304041), we get a palindrome (979707979).

The spelling of 140403938 in words is "one hundred forty million, four hundred three thousand, nine hundred thirty-eight".