1811948 has 12 divisors (see below), whose sum is σ = 3218712. Its totient is φ = 892320.

The previous prime is 1811939. The next prime is 1811959. The reversal of 1811948 is 8491181.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113 + ... + 3648.

It is an arithmetic number, because the mean of its divisors is an integer number (268226).

2^1811948 is an apocalyptic number.

It is an amenable number.

1811948 is a deficient number, since it is larger than the sum of its proper divisors (1406764).

1811948 is a wasteful number, since it uses less digits than its factorization.

1811948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832 (or 6830 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 1811948 is about 1346.0861785190. The cubic root of 1811948 is about 121.9125952831.

The spelling of 1811948 in words is "one million, eight hundred eleven thousand, nine hundred forty-eight".