1605984 has 24 divisors (see below), whose sum is σ = 4215960. Its totient is φ = 535296.

The previous prime is 1605979. The next prime is 1606009. The reversal of 1605984 is 4895061.

It is a tau number, because it is divible by the number of its divisors (24).

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, 8269 + ... + 8460.

It is an arithmetic number, because the mean of its divisors is an integer number (175665).

2^1605984 is an apocalyptic number.

It is an amenable number.

1605984 is an abundant number, since it is smaller than the sum of its proper divisors (2609976).

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

1605984 is a wasteful number, since it uses less digits than its factorization.

1605984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16742 (or 16734 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1605984 is about 1267.2742402495. The cubic root of 1605984 is about 117.1063391454.

The spelling of 1605984 in words is "one million, six hundred five thousand, nine hundred eighty-four".