140731818 has 32 divisors (see below), whose sum is σ = 288423936. Its totient is φ = 45757488.

The previous prime is 140731793. The next prime is 140731823. The reversal of 140731818 is 818137041.

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 15 ways as a sum of consecutive naturals, for example, 107355 + ... + 108657.

It is an arithmetic number, because the mean of its divisors is an integer number (9013248).

Almost surely, 2^140731818 is an apocalyptic number.

140731818 is an abundant number, since it is smaller than the sum of its proper divisors (147692118).

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

140731818 is a wasteful number, since it uses less digits than its factorization.

140731818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 140731818 is about 11863.0442130172. The cubic root of 140731818 is about 520.1525908204.

Adding to 140731818 its reverse (818137041), we get a palindrome (958868859).

The spelling of 140731818 in words is "one hundred forty million, seven hundred thirty-one thousand, eight hundred eighteen".