1800030 has 32 divisors (see below), whose sum is σ = 4471200. Its totient is φ = 463232.

The previous prime is 1800017. The next prime is 1800037. The reversal of 1800030 is 300081.

It is a junction number, because it is equal to n+sod(n) for n = 1799979 and 1800015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165 + ... + 1904.

It is an arithmetic number, because the mean of its divisors is an integer number (139725).

2^1800030 is an apocalyptic number.

1800030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1800030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235600).

1800030 is an abundant number, since it is smaller than the sum of its proper divisors (2671170).

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

1800030 is a wasteful number, since it uses less digits than its factorization.

1800030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2108.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1800030 is about 1341.6519667932. The cubic root of 1800030 is about 121.6447157079.

The spelling of 1800030 in words is "one million, eight hundred thousand, thirty".