1128327457 has 4 divisors (see below), whose sum is σ = 1128651796. Its totient is φ = 1128003120.

The previous prime is 1128327427. The next prime is 1128327461. The reversal of 1128327457 is 7547238211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 927141601 + 201185856 = 30449^2 + 14184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128327457 - 2¹¹ = 1128325409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128327427) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 156894 + ... + 163927.

It is an arithmetic number, because the mean of its divisors is an integer number (282162949).

Almost surely, 2^1128327457 is an apocalyptic number.

It is an amenable number.

1128327457 is a deficient number, since it is larger than the sum of its proper divisors (324339).

1128327457 is an equidigital number, since it uses as much as digits as its factorization.

1128327457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324338.

The product of its digits is 94080, while the sum is 40.

The square root of 1128327457 is about 33590.5858388924. The cubic root of 1128327457 is about 1041.0662932710.

The spelling of 1128327457 in words is "one billion, one hundred twenty-eight million, three hundred twenty-seven thousand, four hundred fifty-seven".