140140728 has 192 divisors, whose sum is σ = 475151040. Its totient is φ = 36329472.

The previous prime is 140140727. The next prime is 140140799. The reversal of 140140728 is 827041041.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140140727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 478150 + ... + 478442.

It is an arithmetic number, because the mean of its divisors is an integer number (2474745).

Almost surely, 2^140140728 is an apocalyptic number.

140140728 is a gapful number since it is divisible by the number (18) 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 140140728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237575520).

140140728 is an abundant number, since it is smaller than the sum of its proper divisors (335010312).

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

140140728 is a wasteful number, since it uses less digits than its factorization.

140140728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 140140728 is about 11838.1049159061. The cubic root of 140140728 is about 519.4233350907.

Adding to 140140728 its reverse (827041041), we get a palindrome (967181769).

The spelling of 140140728 in words is "one hundred forty million, one hundred forty thousand, seven hundred twenty-eight".