1128816 has 100 divisors (see below), whose sum is σ = 3570952. Its totient is φ = 342144.

The previous prime is 1128811. The next prime is 1128821. The reversal of 1128816 is 6188211.

1128816 is nontrivially palindromic in base 11.

It is an interprime number because it is at equal distance from previous prime (1128811) and next prime (1128821).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1128816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16815 + ... + 16881.

2^1128816 is an apocalyptic number.

1128816 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 1128816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785476).

1128816 is an abundant number, since it is smaller than the sum of its proper divisors (2442136).

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

1128816 is a wasteful number, since it uses less digits than its factorization.

1128816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 85 counting only the distinct ones).

The product of its digits is 768, while the sum is 27.

The square root of 1128816 is about 1062.4575285629. The cubic root of 1128816 is about 104.1216525150.

The spelling of 1128816 in words is "one million, one hundred twenty-eight thousand, eight hundred sixteen".