1128354661 has 8 divisors (see below), whose sum is σ = 1290726144. Its totient is φ = 966277680.

The previous prime is 1128354641. The next prime is 1128354679. The reversal of 1128354661 is 1664538211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1128354661 - 2⁵ = 1128354629 is a prime.

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 1128354661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128354641) by changing a digit.

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, 65350 + ... + 80791.

It is an arithmetic number, because the mean of its divisors is an integer number (161340768).

Almost surely, 2^1128354661 is an apocalyptic number.

It is an amenable number.

1128354661 is a deficient number, since it is larger than the sum of its proper divisors (162371483).

1128354661 is a wasteful number, since it uses less digits than its factorization.

1128354661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147251.

The product of its digits is 34560, while the sum is 37.

The square root of 1128354661 is about 33590.9907713363. The cubic root of 1128354661 is about 1041.0746599143.

The spelling of 1128354661 in words is "one billion, one hundred twenty-eight million, three hundred fifty-four thousand, six hundred sixty-one".