1913604 has 96 divisors (see below), whose sum is σ = 5913600. Its totient is φ = 466560.

The previous prime is 1913581. The next prime is 1913609. The reversal of 1913604 is 4063191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913609) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17502 + ... + 17610.

It is an arithmetic number, because the mean of its divisors is an integer number (61600).

2^1913604 is an apocalyptic number.

1913604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1913604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2956800).

1913604 is an abundant number, since it is smaller than the sum of its proper divisors (3999996).

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

1913604 is a wasteful number, since it uses less digits than its factorization.

1913604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 151 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1913604 is about 1383.3307630498. The cubic root of 1913604 is about 124.1511337916.

Adding to 1913604 its reverse (4063191), we get a palindrome (5976795).

The spelling of 1913604 in words is "one million, nine hundred thirteen thousand, six hundred four".