1811968 has 20 divisors (see below), whose sum is σ = 3621420. Its totient is φ = 905728.

The previous prime is 1811959. The next prime is 1811983. The reversal of 1811968 is 8691181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1258 + ... + 2281.

It is an arithmetic number, because the mean of its divisors is an integer number (181071).

2^1811968 is an apocalyptic number.

It is an amenable number.

1811968 is a deficient number, since it is larger than the sum of its proper divisors (1809452).

1811968 is an frugal number, since it uses more digits than its factorization.

1811968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3557 (or 3541 counting only the distinct ones).

The product of its digits is 3456, while the sum is 34.

The square root of 1811968 is about 1346.0936074434. The cubic root of 1811968 is about 121.9130438322.

The spelling of 1811968 in words is "one million, eight hundred eleven thousand, nine hundred sixty-eight".