1809472 has 42 divisors (see below), whose sum is σ = 4184142. Its totient is φ = 774144.

The previous prime is 1809461. The next prime is 1809481. The reversal of 1809472 is 2749081.

It can be written as a sum of positive squares in only one way, i.e., 1806336 + 3136 = 1344^2 + 56^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2848 + ... + 3424.

2^1809472 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 1809472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2092071).

1809472 is an abundant number, since it is smaller than the sum of its proper divisors (2374670).

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

1809472 is an equidigital number, since it uses as much as digits as its factorization.

1809472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603 (or 586 counting only the distinct ones).

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

The square root of 1809472 is about 1345.1661607400. The cubic root of 1809472 is about 121.8570393870.

The spelling of 1809472 in words is "one million, eight hundred nine thousand, four hundred seventy-two".