1089472 has 28 divisors (see below), whose sum is σ = 2240280. Its totient is φ = 525056.

The previous prime is 1089469. The next prime is 1089481. The reversal of 1089472 is 2749801.

1089472 = T₁₃ + T₁₄ + ... + T₁₈₆.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (80010).

2^1089472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1089472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1120140).

1089472 is an abundant number, since it is smaller than the sum of its proper divisors (1150808).

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

1089472 is an equidigital number, since it uses as much as digits as its factorization.

1089472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 1089472 is about 1043.7777541220. Note that the first 4 decimals coincide. The cubic root of 1089472 is about 102.8976266270.

The spelling of 1089472 in words is "one million, eighty-nine thousand, four hundred seventy-two".