1099128 has 32 divisors (see below), whose sum is σ = 2817360. Its totient is φ = 357120.

The previous prime is 1099121. The next prime is 1099139. The reversal of 1099128 is 8219901.

It is a junction number, because it is equal to n+sod(n) for n = 1099095 and 1099104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099121) 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, 426 + ... + 1542.

2^1099128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408680).

1099128 is an abundant number, since it is smaller than the sum of its proper divisors (1718232).

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

1099128 is a wasteful number, since it uses less digits than its factorization.

1099128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1167 (or 1163 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1099128 is about 1048.3930560625. The cubic root of 1099128 is about 103.2007271146.

The spelling of 1099128 in words is "one million, ninety-nine thousand, one hundred twenty-eight".