1129957728 has 48 divisors (see below), whose sum is σ = 2984377536. Its totient is φ = 374336640.

The previous prime is 1129957709. The next prime is 1129957757. The reversal of 1129957728 is 8277599211.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20458 + ... + 51753.

It is an arithmetic number, because the mean of its divisors is an integer number (62174532).

Almost surely, 2^1129957728 is an apocalyptic number.

It is an amenable number.

1129957728 is an abundant number, since it is smaller than the sum of its proper divisors (1854419808).

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

1129957728 is a wasteful number, since it uses less digits than its factorization.

1129957728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72387 (or 72379 counting only the distinct ones).

The product of its digits is 635040, while the sum is 51.

The square root of 1129957728 is about 33614.8438639837. The cubic root of 1129957728 is about 1041.5674490360.

The spelling of 1129957728 in words is "one billion, one hundred twenty-nine million, nine hundred fifty-seven thousand, seven hundred twenty-eight".