1128380 has 48 divisors (see below), whose sum is σ = 2709504. Its totient is φ = 390720.

The previous prime is 1128373. The next prime is 1128383. The reversal of 1128380 is 838211.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128383) 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, 4949 + ... + 5171.

It is an arithmetic number, because the mean of its divisors is an integer number (56448).

2^1128380 is an apocalyptic number.

1128380 is a gapful number since it is divisible by the number (10) 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 1128380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354752).

1128380 is an abundant number, since it is smaller than the sum of its proper divisors (1581124).

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

1128380 is a wasteful number, since it uses less digits than its factorization.

1128380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1128380 is about 1062.2523240737. The cubic root of 1128380 is about 104.1082452852.

The spelling of 1128380 in words is "one million, one hundred twenty-eight thousand, three hundred eighty".