1128990163 has 8 divisors (see below), whose sum is σ = 1292745728. Its totient is φ = 965852424.

The previous prime is 1128990151. The next prime is 1128990173. The reversal of 1128990163 is 3610998211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128990163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128990143) 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, 150531 + ... + 157852.

It is an arithmetic number, because the mean of its divisors is an integer number (161593216).

Almost surely, 2^1128990163 is an apocalyptic number.

1128990163 is a deficient number, since it is larger than the sum of its proper divisors (163755565).

1128990163 is an equidigital number, since it uses as much as digits as its factorization.

1128990163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308913.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 1128990163 is about 33600.4488511686. The cubic root of 1128990163 is about 1041.2700715410.

The spelling of 1128990163 in words is "one billion, one hundred twenty-eight million, nine hundred ninety thousand, one hundred sixty-three".