1128340 has 12 divisors (see below), whose sum is σ = 2369556. Its totient is φ = 451328.

The previous prime is 1128313. The next prime is 1128349. The reversal of 1128340 is 438211.

It can be written as a sum of positive squares in 2 ways, for example, as 544644 + 583696 = 738^2 + 764^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28189 + ... + 28228.

It is an arithmetic number, because the mean of its divisors is an integer number (197463).

2^1128340 is an apocalyptic number.

1128340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128340 is an abundant number, since it is smaller than the sum of its proper divisors (1241216).

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

1128340 is a wasteful number, since it uses less digits than its factorization.

1128340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56426 (or 56424 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1128340 is about 1062.2334959885. The cubic root of 1128340 is about 104.1070150912.

The spelling of 1128340 in words is "one million, one hundred twenty-eight thousand, three hundred forty".