1089270 has 144 divisors (see below), whose sum is σ = 3734640. Its totient is φ = 217728.

The previous prime is 1089259. The next prime is 1089299. The reversal of 1089270 is 729801.

It is a harmonic number, since the harmonic mean of its divisors is an integer.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 57321 + ... + 57339.

It is an arithmetic number, because the mean of its divisors is an integer number (25935).

2^1089270 is an apocalyptic number.

1089270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867320).

1089270 is an abundant number, since it is smaller than the sum of its proper divisors (2645370).

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

1089270 is a wasteful number, since it uses less digits than its factorization.

1089270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1089270 is about 1043.6809857423. The cubic root of 1089270 is about 102.8912667862.

The spelling of 1089270 in words is "one million, eighty-nine thousand, two hundred seventy".