1128983856 has 160 divisors (see below), whose sum is σ = 3916082688. Its totient is φ = 270673920.

The previous prime is 1128983837. The next prime is 1128983879. The reversal of 1128983856 is 6583898211.

It is a junction number, because it is equal to n+sod(n) for n = 1128983799 and 1128983808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36300 + ... + 59796.

Almost surely, 2^1128983856 is an apocalyptic number.

1128983856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128983856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1958041344).

1128983856 is an abundant number, since it is smaller than the sum of its proper divisors (2787098832).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128983856 is a wasteful number, since it uses less digits than its factorization.

1128983856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23539 (or 23533 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 1128983856 is about 33600.3549981246. The cubic root of 1128983856 is about 1041.2681325508.

The spelling of 1128983856 in words is "one billion, one hundred twenty-eight million, nine hundred eighty-three thousand, eight hundred fifty-six".