1605396 has 48 divisors (see below), whose sum is σ = 4148928. Its totient is φ = 480000.

The previous prime is 1605389. The next prime is 1605413. The reversal of 1605396 is 6935061.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6271 + ... + 6521.

It is an arithmetic number, because the mean of its divisors is an integer number (86436).

2^1605396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1605396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2074464).

1605396 is an abundant number, since it is smaller than the sum of its proper divisors (2543532).

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

1605396 is a wasteful number, since it uses less digits than its factorization.

1605396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 1605396 is about 1267.0422250265. The cubic root of 1605396 is about 117.0920453266.

The spelling of 1605396 in words is "one million, six hundred five thousand, three hundred ninety-six".