1811648 has 14 divisors (see below), whose sum is σ = 3595116. Its totient is φ = 905792.

The previous prime is 1811647. The next prime is 1811651. The reversal of 1811648 is 8461181.

It is a self number, because there is not a number n which added to its sum of digits gives 1811648.

It is not an unprimeable number, because it can be changed into a prime (1811647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14090 + ... + 14217.

It is an arithmetic number, because the mean of its divisors is an integer number (256794).

2^1811648 is an apocalyptic number.

It is an amenable number.

1811648 is a deficient number, since it is larger than the sum of its proper divisors (1783468).

1811648 is an equidigital number, since it uses as much as digits as its factorization.

1811648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28319 (or 28309 counting only the distinct ones).

The product of its digits is 1536, while the sum is 29.

The square root of 1811648 is about 1345.9747397333. The cubic root of 1811648 is about 121.9058666505.

The spelling of 1811648 in words is "one million, eight hundred eleven thousand, six hundred forty-eight".