1289088 has 64 divisors (see below), whose sum is σ = 3814800. Its totient is φ = 428544.

The previous prime is 1289083. The next prime is 1289111. The reversal of 1289088 is 8809821.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3270 + ... + 3642.

2^1289088 is an apocalyptic number.

1289088 is a gapful number since it is divisible by the number (18) 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 1289088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1907400).

1289088 is an abundant number, since it is smaller than the sum of its proper divisors (2525712).

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

1289088 is an equidigital number, since it uses as much as digits as its factorization.

1289088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 1289088 is about 1135.3801125614. The cubic root of 1289088 is about 108.8330637688.

It can be divided in two parts, 128 and 9088, that added together give a square (9216 = 96²).

The spelling of 1289088 in words is "one million, two hundred eighty-nine thousand, eighty-eight".