140207840 has 96 divisors (see below), whose sum is σ = 369321120. Its totient is φ = 49987584.

The previous prime is 140207827. The next prime is 140207863. The reversal of 140207840 is 48702041.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50324 + ... + 53036.

It is an arithmetic number, because the mean of its divisors is an integer number (3847095).

Almost surely, 2^140207840 is an apocalyptic number.

140207840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140207840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184660560).

140207840 is an abundant number, since it is smaller than the sum of its proper divisors (229113280).

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

140207840 is a wasteful number, since it uses less digits than its factorization.

140207840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2764 (or 2756 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 140207840 is about 11840.9391519423. The cubic root of 140207840 is about 519.5062374138.

Adding to 140207840 its reverse (48702041), we get a palindrome (188909881).

The spelling of 140207840 in words is "one hundred forty million, two hundred seven thousand, eight hundred forty".