1605996 has 36 divisors (see below), whose sum is σ = 4640272. Its totient is φ = 458784.

The previous prime is 1605979. The next prime is 1606009. The reversal of 1605996 is 6995061.

1605996 is a `hidden beast` number, since 1 + 60 + 599 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1605996.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2935 + ... + 3438.

2^1605996 is an apocalyptic number.

It is an amenable number.

1605996 is an abundant number, since it is smaller than the sum of its proper divisors (3034276).

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

1605996 is a wasteful number, since it uses less digits than its factorization.

1605996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6390 (or 6385 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1605996 is about 1267.2789748118. The cubic root of 1605996 is about 117.1066308197.

It can be divided in two parts, 1605 and 996, that added together give a square (2601 = 51²).

The spelling of 1605996 in words is "one million, six hundred five thousand, nine hundred ninety-six".