140028 has 24 divisors (see below), whose sum is σ = 373632. Its totient is φ = 39984.

The previous prime is 140009. The next prime is 140053. The reversal of 140028 is 820041.

140028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 139989 and 140016.

It is a congruent number.

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, 750 + ... + 917.

It is an arithmetic number, because the mean of its divisors is an integer number (15568).

2¹⁴⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

140028 is an abundant number, since it is smaller than the sum of its proper divisors (233604).

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

140028 is a wasteful number, since it uses less digits than its factorization.

140028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 140028 is about 374.2031533806. The cubic root of 140028 is about 51.9284024505.

Adding to 140028 its reverse (820041), we get a palindrome (960069).

The spelling of 140028 in words is "one hundred forty thousand, twenty-eight".