1128079731 has 8 divisors (see below), whose sum is σ = 1524710800. Its totient is φ = 741750912.

The previous prime is 1128079709. The next prime is 1128079847. The reversal of 1128079731 is 1379708211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1128079731 - 2⁹ = 1128079219 is a prime.

It is a super-2 number, since 2×1128079731² = 2545127758986064722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128079731.

It is not an unprimeable number, because it can be changed into a prime (1128079031) 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, 2575306 + ... + 2575743.

It is an arithmetic number, because the mean of its divisors is an integer number (190588850).

Almost surely, 2^1128079731 is an apocalyptic number.

1128079731 is a deficient number, since it is larger than the sum of its proper divisors (396631069).

1128079731 is an equidigital number, since it uses as much as digits as its factorization.

1128079731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151125.

The product of its (nonzero) digits is 21168, while the sum is 39.

The square root of 1128079731 is about 33586.8982045083. The cubic root of 1128079731 is about 1040.9900984680.

The spelling of 1128079731 in words is "one billion, one hundred twenty-eight million, seventy-nine thousand, seven hundred thirty-one".