1838430 has 64 divisors (see below), whose sum is σ = 5356800. Its totient is φ = 444960.

The previous prime is 1838429. The next prime is 1838453. The reversal of 1838430 is 348381.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1838394 and 1838403.

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, 2661 + ... + 3279.

It is an arithmetic number, because the mean of its divisors is an integer number (83700).

2^1838430 is an apocalyptic number.

1838430 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 1838430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2678400).

1838430 is an abundant number, since it is smaller than the sum of its proper divisors (3518370).

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

1838430 is a wasteful number, since it uses less digits than its factorization.

1838430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1838430 is about 1355.8871634469. The cubic root of 1838430 is about 122.5036511476.

Subtracting from 1838430 its sum of digits (27), we obtain a triangular number (1838403 = T₁₉₁₇).

The spelling of 1838430 in words is "one million, eight hundred thirty-eight thousand, four hundred thirty".