1140720028 has 24 divisors (see below), whose sum is σ = 2282155232. Its totient is φ = 488726784.

The previous prime is 1140720023. The next prime is 1140720047. The reversal of 1140720028 is 8200270411.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1140719984 and 1140720011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140720023) 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, 170800 + ... + 177352.

Almost surely, 2^1140720028 is an apocalyptic number.

It is an amenable number.

1140720028 is an abundant number, since it is smaller than the sum of its proper divisors (1141435204).

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

1140720028 is a wasteful number, since it uses less digits than its factorization.

1140720028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12781 (or 12779 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 1140720028 is about 33774.5470435948. The cubic root of 1140720028 is about 1044.8638141248.

Adding to 1140720028 its reverse (8200270411), we get a palindrome (9340990439).

The spelling of 1140720028 in words is "one billion, one hundred forty million, seven hundred twenty thousand, twenty-eight".