140640318 has 96 divisors (see below), whose sum is σ = 394867200. Its totient is φ = 35131968.

The previous prime is 140640317. The next prime is 140640329. The reversal of 140640318 is 813046041.

140640318 is a `hidden beast` number, since 1 + 4 + 0 + 640 + 3 + 18 = 666.

It is a super-2 number, since 2×140640318² = 39559398094282248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 140640291 and 140640300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140640317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28863 + ... + 33381.

It is an arithmetic number, because the mean of its divisors is an integer number (4113200).

Almost surely, 2^140640318 is an apocalyptic number.

140640318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 140640318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197433600).

140640318 is an abundant number, since it is smaller than the sum of its proper divisors (254226882).

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

140640318 is a wasteful number, since it uses less digits than its factorization.

140640318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4566 (or 4563 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 140640318 is about 11859.1870716335. The cubic root of 140640318 is about 520.0398366917.

Adding to 140640318 its reverse (813046041), we get a palindrome (953686359).

The spelling of 140640318 in words is "one hundred forty million, six hundred forty thousand, three hundred eighteen".