140440420 has 24 divisors (see below), whose sum is σ = 295646400. Its totient is φ = 56038752.

The previous prime is 140440379. The next prime is 140440427. The reversal of 140440420 is 24044041.

140440420 is a nontrivial binomial coefficient, being equal to C(16760, 2).

It is not an unprimeable number, because it can be changed into a prime (140440427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1 + ... + 16759.

It is an arithmetic number, because the mean of its divisors is an integer number (12318600).

Almost surely, 2^140440420 is an apocalyptic number.

140440420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

140440420 is the 16759-th triangular number and also the 8380-th hexagonal number.

140440420 is the 5587-th centered nonagonal number.

It is an amenable number.

140440420 is an abundant number, since it is smaller than the sum of its proper divisors (155205980).

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

140440420 is a wasteful number, since it uses less digits than its factorization.

140440420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17187 (or 17185 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 140440420 is about 11850.7560940220. The cubic root of 140440420 is about 519.7933350352.

Adding to 140440420 its reverse (24044041), we get a palindrome (164484461).

The spelling of 140440420 in words is "one hundred forty million, four hundred forty thousand, four hundred twenty".