1231828 has 12 divisors (see below), whose sum is σ = 2321620. Its totient is φ = 568512.

The previous prime is 1231817. The next prime is 1231829. The reversal of 1231828 is 8281321.

1231828 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in 2 ways, for example, as 91204 + 1140624 = 302^2 + 1068^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231829) 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 3 ways as a sum of consecutive naturals, for example, 11793 + ... + 11896.

2^1231828 is an apocalyptic number.

It is an amenable number.

1231828 is a deficient number, since it is larger than the sum of its proper divisors (1089792).

1231828 is a wasteful number, since it uses less digits than its factorization.

1231828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23706 (or 23704 counting only the distinct ones).

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

The square root of 1231828 is about 1109.8774707147. The cubic root of 1231828 is about 107.1971791416.

The spelling of 1231828 in words is "one million, two hundred thirty-one thousand, eight hundred twenty-eight".