140305818 has 24 divisors (see below), whose sum is σ = 287311968. Its totient is φ = 45677352.

The previous prime is 140305807. The next prime is 140305831. The reversal of 140305818 is 818503041.

140305818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4771 + ... + 17417.

It is an arithmetic number, because the mean of its divisors is an integer number (11971332).

Almost surely, 2^140305818 is an apocalyptic number.

140305818 is an abundant number, since it is smaller than the sum of its proper divisors (147006150).

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

140305818 is a wasteful number, since it uses less digits than its factorization.

140305818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12738 (or 12695 counting only the distinct ones).

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

The square root of 140305818 is about 11845.0756857016. The cubic root of 140305818 is about 519.6272204969.

Adding to 140305818 its reverse (818503041), we get a palindrome (958808859).

The spelling of 140305818 in words is "one hundred forty million, three hundred five thousand, eight hundred eighteen".