1912404 has 72 divisors (see below), whose sum is σ = 5164992. Its totient is φ = 549120.

The previous prime is 1912387. The next prime is 1912423. The reversal of 1912404 is 4042191.

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 23 ways as a sum of consecutive naturals, for example, 46624 + ... + 46664.

It is an arithmetic number, because the mean of its divisors is an integer number (71736).

2^1912404 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 1912404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2582496).

1912404 is an abundant number, since it is smaller than the sum of its proper divisors (3252588).

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

1912404 is a wasteful number, since it uses less digits than its factorization.

1912404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 1912404 is about 1382.8969592851. The cubic root of 1912404 is about 124.1251770954.

Adding to 1912404 its reverse (4042191), we get a palindrome (5954595).

The spelling of 1912404 in words is "one million, nine hundred twelve thousand, four hundred four".