140137728 has 36 divisors (see below), whose sum is σ = 372972768. Its totient is φ = 46712320.

The previous prime is 140137717. The next prime is 140137747. The reversal of 140137728 is 827731041.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90468 + ... + 92003.

Almost surely, 2^140137728 is an apocalyptic number.

It is an amenable number.

140137728 is an abundant number, since it is smaller than the sum of its proper divisors (232835040).

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

140137728 is an equidigital number, since it uses as much as digits as its factorization.

140137728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182490 (or 182476 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 140137728 is about 11837.9782057579. The cubic root of 140137728 is about 519.4196286233.

Adding to 140137728 its reverse (827731041), we get a palindrome (967868769).

The spelling of 140137728 in words is "one hundred forty million, one hundred thirty-seven thousand, seven hundred twenty-eight".