1142757728 has 96 divisors (see below), whose sum is σ = 2659293504. Its totient is φ = 473167872.

The previous prime is 1142757719. The next prime is 1142757757. The reversal of 1142757728 is 8277572411.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1433426 + ... + 1434222.

It is an arithmetic number, because the mean of its divisors is an integer number (27700974).

Almost surely, 2^1142757728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1142757728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1329646752).

1142757728 is an abundant number, since it is smaller than the sum of its proper divisors (1516535776).

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

1142757728 is a wasteful number, since it uses less digits than its factorization.

1142757728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1016 counting only the distinct ones).

The product of its digits is 219520, while the sum is 44.

The square root of 1142757728 is about 33804.6997915970. The cubic root of 1142757728 is about 1045.4856004908.

The spelling of 1142757728 in words is "one billion, one hundred forty-two million, seven hundred fifty-seven thousand, seven hundred twenty-eight".