1812930 has 64 divisors (see below), whose sum is σ = 5080320. Its totient is φ = 405504.

The previous prime is 1812917. The next prime is 1812947. The reversal of 1812930 is 392181.

It is a self number, because there is not a number n which added to its sum of digits gives 1812930.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 18642 + ... + 18738.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2^1812930 is an apocalyptic number.

1812930 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 1812930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2540160).

1812930 is an abundant number, since it is smaller than the sum of its proper divisors (3267390).

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

1812930 is a wasteful number, since it uses less digits than its factorization.

1812930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1812930 is about 1346.4508903038. The cubic root of 1812930 is about 121.9346151475.

The spelling of 1812930 in words is "one million, eight hundred twelve thousand, nine hundred thirty".