1128240 has 60 divisors (see below), whose sum is σ = 3791424. Its totient is φ = 300672.

The previous prime is 1128233. The next prime is 1128247. The reversal of 1128240 is 428211.

It is an interprime number because it is at equal distance from previous prime (1128233) and next prime (1128247).

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1128247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64 + ... + 1503.

2^1128240 is an apocalyptic number.

1128240 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 1128240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1895712).

1128240 is an abundant number, since it is smaller than the sum of its proper divisors (2663184).

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

1128240 is a wasteful number, since it uses less digits than its factorization.

1128240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1586 (or 1577 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1128240 is about 1062.1864243154. The cubic root of 1128240 is about 104.1039394789.

The spelling of 1128240 in words is "one million, one hundred twenty-eight thousand, two hundred forty".