1128989846 has 16 divisors (see below), whose sum is σ = 1701777600. Its totient is φ = 561738240.

The previous prime is 1128989803. The next prime is 1128989863. The reversal of 1128989846 is 6489898211.

It is a super-2 number, since 2×1128989846² = 2549236144742207432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1128989791 and 1128989800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385580 + ... + 388496.

It is an arithmetic number, because the mean of its divisors is an integer number (106361100).

Almost surely, 2^1128989846 is an apocalyptic number.

1128989846 is a deficient number, since it is larger than the sum of its proper divisors (572787754).

1128989846 is a wasteful number, since it uses less digits than its factorization.

1128989846 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3799.

The product of its digits is 1990656, while the sum is 56.

The square root of 1128989846 is about 33600.4441339694. Note that the first 3 decimals coincide. The cubic root of 1128989846 is about 1041.2699740844.

The spelling of 1128989846 in words is "one billion, one hundred twenty-eight million, nine hundred eighty-nine thousand, eight hundred forty-six".