140020240 has 20 divisors (see below), whose sum is σ = 325547244. Its totient is φ = 56008064.

The previous prime is 140020219. The next prime is 140020241. The reversal of 140020240 is 42020041.

It can be written as a sum of positive squares in 2 ways, for example, as 72386064 + 67634176 = 8508^2 + 8224^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 140020240.

It is not an unprimeable number, because it can be changed into a prime (140020241) 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, 875047 + ... + 875206.

Almost surely, 2^140020240 is an apocalyptic number.

140020240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140020240 is an abundant number, since it is smaller than the sum of its proper divisors (185527004).

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

140020240 is a wasteful number, since it uses less digits than its factorization.

140020240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1750266 (or 1750260 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 140020240 is about 11833.0148313944. The cubic root of 140020240 is about 519.2744318557.

Adding to 140020240 its reverse (42020041), we get a palindrome (182040281).

The spelling of 140020240 in words is "one hundred forty million, twenty thousand, two hundred forty".