140244140 has 24 divisors (see below), whose sum is σ = 294824880. Its totient is φ = 56038208.

The previous prime is 140244131. The next prime is 140244161. The reversal of 140244140 is 41442041.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19019 + ... + 25341.

It is an arithmetic number, because the mean of its divisors is an integer number (12284370).

Almost surely, 2^140244140 is an apocalyptic number.

140244140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

140244140 is an abundant number, since it is smaller than the sum of its proper divisors (154580740).

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

140244140 is a wasteful number, since it uses less digits than its factorization.

140244140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441 (or 7439 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 140244140 is about 11842.4718703487. The cubic root of 140244140 is about 519.5510671684.

Adding to 140244140 its reverse (41442041), we get a palindrome (181686181).

The spelling of 140244140 in words is "one hundred forty million, two hundred forty-four thousand, one hundred forty".