1800930 has 32 divisors (see below), whose sum is σ = 4359744. Its totient is φ = 476096.

The previous prime is 1800913. The next prime is 1800937. The reversal of 1800930 is 390081.

It is a junction number, because it is equal to n+sod(n) for n = 1800897 and 1800906.

It is not an unprimeable number, because it can be changed into a prime (1800937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5017 + ... + 5363.

It is an arithmetic number, because the mean of its divisors is an integer number (136242).

2^1800930 is an apocalyptic number.

1800930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1800930 is an abundant number, since it is smaller than the sum of its proper divisors (2558814).

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

1800930 is a wasteful number, since it uses less digits than its factorization.

1800930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1800930 is about 1341.9873322800. The cubic root of 1800930 is about 121.6649861114.

The spelling of 1800930 in words is "one million, eight hundred thousand, nine hundred thirty".