1812408 has 64 divisors (see below), whose sum is σ = 5043360. Its totient is φ = 539136.

The previous prime is 1812403. The next prime is 1812409. The reversal of 1812408 is 8042181.

It is a Harshad number since it is a multiple of its sum of digits (24).

1812408 is a Rhonda number in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812401) 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, 11466 + ... + 11622.

2^1812408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2521680).

1812408 is an abundant number, since it is smaller than the sum of its proper divisors (3230952).

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

1812408 is a wasteful number, since it uses less digits than its factorization.

1812408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1812408 is about 1346.2570334078. The cubic root of 1812408 is about 121.9229110774.

Adding to 1812408 its reverse (8042181), we get a palindrome (9854589).

The spelling of 1812408 in words is "one million, eight hundred twelve thousand, four hundred eight".