1903604 has 12 divisors (see below), whose sum is σ = 3381504. Its totient is φ = 937464.

The previous prime is 1903597. The next prime is 1903619. The reversal of 1903604 is 4063091.

It is a self number, because there is not a number n which added to its sum of digits gives 1903604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3284 + ... + 3819.

It is an arithmetic number, because the mean of its divisors is an integer number (281792).

2^1903604 is an apocalyptic number.

It is an amenable number.

1903604 is a deficient number, since it is larger than the sum of its proper divisors (1477900).

1903604 is a wasteful number, since it uses less digits than its factorization.

1903604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7174 (or 7172 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1903604 is about 1379.7115640597. The cubic root of 1903604 is about 123.9344954059.

Adding to 1903604 its reverse (4063091), we get a palindrome (5966695).

The spelling of 1903604 in words is "one million, nine hundred three thousand, six hundred four".