1605696 has 28 divisors (see below), whose sum is σ = 4248912. Its totient is φ = 535168.

The previous prime is 1605691. The next prime is 1605697. The reversal of 1605696 is 6965061.

It is not an unprimeable number, because it can be changed into a prime (1605691) 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, 3990 + ... + 4373.

2^1605696 is an apocalyptic number.

1605696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1605696 is an abundant number, since it is smaller than the sum of its proper divisors (2643216).

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

1605696 is an equidigital number, since it uses as much as digits as its factorization.

1605696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8378 (or 8368 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 1605696 is about 1267.1606054483. The cubic root of 1605696 is about 117.0993385273.

The spelling of 1605696 in words is "one million, six hundred five thousand, six hundred ninety-six".