140640040 has 16 divisors (see below), whose sum is σ = 316440180. Its totient is φ = 56256000.

The previous prime is 140640037. The next prime is 140640043. The reversal of 140640040 is 40046041.

140640040 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (140640037) and next prime (140640043).

It can be written as a sum of positive squares in 2 ways, for example, as 121925764 + 18714276 = 11042^2 + 4326^2 .

It is not an unprimeable number, because it can be changed into a prime (140640043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1757961 + ... + 1758040.

Almost surely, 2^140640040 is an apocalyptic number.

140640040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140640040 is an abundant number, since it is smaller than the sum of its proper divisors (175800140).

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

140640040 is a wasteful number, since it uses less digits than its factorization.

140640040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3516012 (or 3516008 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140640040 is about 11859.1753507569. The cubic root of 140640040 is about 520.0394940418.

Adding to 140640040 its reverse (40046041), we get a palindrome (180686081).

The spelling of 140640040 in words is "one hundred forty million, six hundred forty thousand, forty".