1809072 has 60 divisors (see below), whose sum is σ = 5367960. Its totient is φ = 566784.

The previous prime is 1809029. The next prime is 1809079. The reversal of 1809072 is 2709081.

1809072 is nontrivially palindromic in base 11.

It is not an unprimeable number, because it can be changed into a prime (1809079) 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 11 ways as a sum of consecutive naturals, for example, 2079 + ... + 2817.

It is an arithmetic number, because the mean of its divisors is an integer number (89466).

2^1809072 is an apocalyptic number.

1809072 is a gapful number since it is divisible by the number (12) 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 1809072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2683980).

1809072 is an abundant number, since it is smaller than the sum of its proper divisors (3558888).

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

1809072 is a wasteful number, since it uses less digits than its factorization.

1809072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 761 counting only the distinct ones).

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

The square root of 1809072 is about 1345.0174720055. The cubic root of 1809072 is about 121.8480595285.

Subtracting 1809072 from its reverse (2709081), we obtain a palindrome (900009).

The spelling of 1809072 in words is "one million, eight hundred nine thousand, seventy-two".