1128890 has 16 divisors (see below), whose sum is σ = 2322432. Its totient is φ = 387024.

The previous prime is 1128889. The next prime is 1128899. The reversal of 1128890 is 988211.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1128899) 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, 7994 + ... + 8133.

It is an arithmetic number, because the mean of its divisors is an integer number (145152).

2^1128890 is an apocalyptic number.

1128890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1128890 is an abundant number, since it is smaller than the sum of its proper divisors (1193542).

1128890 is a wasteful number, since it uses less digits than its factorization.

1128890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16141.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 1128890 is about 1062.4923529137. The cubic root of 1128890 is about 104.1239277113.

The spelling of 1128890 in words is "one million, one hundred twenty-eight thousand, eight hundred ninety".