1800828 has 18 divisors (see below), whose sum is σ = 4552184. Its totient is φ = 600264.

The previous prime is 1800823. The next prime is 1800829. The reversal of 1800828 is 8280081.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24976 + ... + 25047.

2^1800828 is an apocalyptic number.

1800828 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1800828 is an abundant number, since it is smaller than the sum of its proper divisors (2751356).

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

1800828 is a wasteful number, since it uses less digits than its factorization.

1800828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50033 (or 50028 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 1800828 is about 1341.9493284025. The cubic root of 1800828 is about 121.6626891383.

It can be divided in two parts, 1800 and 828, that added together give a triangular number (2628 = T₇₂).

The spelling of 1800828 in words is "one million, eight hundred thousand, eight hundred twenty-eight".