1604244 has 24 divisors (see below), whose sum is σ = 3831520. Its totient is φ = 522144.

The previous prime is 1604243. The next prime is 1604263. The reversal of 1604244 is 4424061.

It is a self number, because there is not a number n which added to its sum of digits gives 1604244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1039 + ... + 2070.

2^1604244 is an apocalyptic number.

It is an amenable number.

1604244 is an abundant number, since it is smaller than the sum of its proper divisors (2227276).

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

1604244 is a wasteful number, since it uses less digits than its factorization.

1604244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159 (or 3157 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1604244 is about 1266.5875413883. The cubic root of 1604244 is about 117.0640309896.

The spelling of 1604244 in words is "one million, six hundred four thousand, two hundred forty-four".