1641828 has 36 divisors (see below), whose sum is σ = 4053840. Its totient is φ = 517104.

The previous prime is 1641821. The next prime is 1641833. The reversal of 1641828 is 8281461.

It is a junction number, because it is equal to n+sod(n) for n = 1641795 and 1641804.

It is not an unprimeable number, because it can be changed into a prime (1641821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4143 + ... + 4521.

2^1641828 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1641828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026920).

1641828 is an abundant number, since it is smaller than the sum of its proper divisors (2412012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641828 is a wasteful number, since it uses less digits than its factorization.

1641828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 403 counting only the distinct ones).

The product of its digits is 3072, while the sum is 30.

The square root of 1641828 is about 1281.3383628066. The cubic root of 1641828 is about 117.9711698216.

The spelling of 1641828 in words is "one million, six hundred forty-one thousand, eight hundred twenty-eight".