1128090 has 32 divisors (see below), whose sum is σ = 2797056. Its totient is φ = 290880.

The previous prime is 1128089. The next prime is 1128091. The reversal of 1128090 is 908211.

It is an interprime number because it is at equal distance from previous prime (1128089) and next prime (1128091).

It is a Smith number, since the sum of its digits (21) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1128091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (87408).

2^1128090 is an apocalyptic number.

1128090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1128090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1398528).

1128090 is an abundant number, since it is smaller than the sum of its proper divisors (1668966).

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

1128090 is a wasteful number, since it uses less digits than its factorization.

1128090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 1128090 is about 1062.1158128942. The cubic root of 1128090 is about 104.0993257197.

The spelling of 1128090 in words is "one million, one hundred twenty-eight thousand, ninety".