1830402 has 48 divisors (see below), whose sum is σ = 4617600. Its totient is φ = 513216.

The previous prime is 1830401. The next prime is 1830419. The reversal of 1830402 is 2040381.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1830401) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 9099 + ... + 9297.

It is an arithmetic number, because the mean of its divisors is an integer number (96200).

2^1830402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1830402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2308800).

1830402 is an abundant number, since it is smaller than the sum of its proper divisors (2787198).

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

1830402 is a wasteful number, since it uses less digits than its factorization.

1830402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 284 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1830402 is about 1352.9235011633. The cubic root of 1830402 is about 122.3250758945.

Adding to 1830402 its reverse (2040381), we get a palindrome (3870783).

The spelling of 1830402 in words is "one million, eight hundred thirty thousand, four hundred two".