1128540 has 48 divisors (see below), whose sum is σ = 3612672. Its totient is φ = 257856.

The previous prime is 1128539. The next prime is 1128553. The reversal of 1128540 is 458211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 924 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (75264).

2^1128540 is an apocalyptic number.

1128540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128540 is an abundant number, since it is smaller than the sum of its proper divisors (2484132).

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

1128540 is a wasteful number, since it uses less digits than its factorization.

1128540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706 (or 2704 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1128540 is about 1062.3276330775. The cubic root of 1128540 is about 104.1131657706.

It can be divided in two parts, 11285 and 40, that added together give a triangular number (11325 = T₁₅₀).

The spelling of 1128540 in words is "one million, one hundred twenty-eight thousand, five hundred forty".