140320418 has 12 divisors (see below), whose sum is σ = 244844982. Its totient is φ = 60137280.

The previous prime is 140320417. The next prime is 140320421. The reversal of 140320418 is 814023041.

It can be written as a sum of positive squares in only one way, i.e., 120934009 + 19386409 = 10997^2 + 4403^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140320393 and 140320402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140320417) 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 5 ways as a sum of consecutive naturals, for example, 715823 + ... + 716018.

Almost surely, 2^140320418 is an apocalyptic number.

140320418 is a deficient number, since it is larger than the sum of its proper divisors (104524564).

140320418 is a wasteful number, since it uses less digits than its factorization.

140320418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431857 (or 1431850 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 140320418 is about 11845.6919595269. The cubic root of 140320418 is about 519.6452437321.

Adding to 140320418 its reverse (814023041), we get a palindrome (954343459).

The spelling of 140320418 in words is "one hundred forty million, three hundred twenty thousand, four hundred eighteen".