1821832 has 8 divisors (see below), whose sum is σ = 3415950. Its totient is φ = 910912.

The previous prime is 1821821. The next prime is 1821847. The reversal of 1821832 is 2381281.

It can be written as a sum of positive squares in only one way, i.e., 1378276 + 443556 = 1174^2 + 666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1821797 and 1821806.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113857 + ... + 113872.

2^1821832 is an apocalyptic number.

It is an amenable number.

1821832 is a deficient number, since it is larger than the sum of its proper divisors (1594118).

1821832 is a wasteful number, since it uses less digits than its factorization.

1821832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227735 (or 227731 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

The square root of 1821832 is about 1349.7525699179. The cubic root of 1821832 is about 122.1338672114.

The spelling of 1821832 in words is "one million, eight hundred twenty-one thousand, eight hundred thirty-two".