1605648 has 40 divisors (see below), whose sum is σ = 4526496. Its totient is φ = 486400.

The previous prime is 1605631. The next prime is 1605677. The reversal of 1605648 is 8465061.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 993 + ... + 2048.

2^1605648 is an apocalyptic number.

It is an amenable number.

1605648 is an abundant number, since it is smaller than the sum of its proper divisors (2920848).

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

1605648 is a wasteful number, since it uses less digits than its factorization.

1605648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063 (or 3057 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 1605648 is about 1267.1416653240. The cubic root of 1605648 is about 117.0981716763.

The spelling of 1605648 in words is "one million, six hundred five thousand, six hundred forty-eight".