1604144 has 20 divisors (see below), whose sum is σ = 3140424. Its totient is φ = 793728.

The previous prime is 1604143. The next prime is 1604147. The reversal of 1604144 is 4414061.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1604143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1244 + ... + 2180.

2^1604144 is an apocalyptic number.

It is an amenable number.

1604144 is a deficient number, since it is larger than the sum of its proper divisors (1536280).

1604144 is a wasteful number, since it uses less digits than its factorization.

1604144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1046 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1604144 is about 1266.5480646229. The cubic root of 1604144 is about 117.0615985569.

The spelling of 1604144 in words is "one million, six hundred four thousand, one hundred forty-four".