1605798 has 32 divisors (see below), whose sum is σ = 3611520. Its totient is φ = 528840.

The previous prime is 1605767. The next prime is 1605811. The reversal of 1605798 is 8975061.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6961 + ... + 7187.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2^1605798 is an apocalyptic number.

1605798 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1605798 is an abundant number, since it is smaller than the sum of its proper divisors (2005722).

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

1605798 is a wasteful number, since it uses less digits than its factorization.

1605798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1605798 is about 1267.2008522724. The cubic root of 1605798 is about 117.1018180086.

The spelling of 1605798 in words is "one million, six hundred five thousand, seven hundred ninety-eight".