1128940 has 24 divisors (see below), whose sum is σ = 2423232. Its totient is φ = 441600.

The previous prime is 1128937. The next prime is 1128943. The reversal of 1128940 is 498211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1128937) and next prime (1128943).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1128943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (100968).

2^1128940 is an apocalyptic number.

1128940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128940 is an abundant number, since it is smaller than the sum of its proper divisors (1294292).

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

1128940 is a wasteful number, since it uses less digits than its factorization.

1128940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257 (or 1255 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1128940 is about 1062.5158822342. The cubic root of 1128940 is about 104.1254649498.

The spelling of 1128940 in words is "one million, one hundred twenty-eight thousand, nine hundred forty".