1982305 has 8 divisors (see below), whose sum is σ = 2561832. Its totient is φ = 1463808.

The previous prime is 1982293. The next prime is 1982371. The reversal of 1982305 is 5032891.

It can be written as a sum of positive squares in 4 ways, for example, as 135424 + 1846881 = 368^2 + 1359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1982305 - 2⁵ = 1982273 is a prime.

It is a super-2 number, since 2×1982305² = 7859066226050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15184 + ... + 15313.

It is an arithmetic number, because the mean of its divisors is an integer number (320229).

2^1982305 is an apocalyptic number.

It is an amenable number.

1982305 is a deficient number, since it is larger than the sum of its proper divisors (579527).

1982305 is a wasteful number, since it uses less digits than its factorization.

1982305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30515.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1982305 is about 1407.9435357996. The cubic root of 1982305 is about 125.6194320280.

The spelling of 1982305 in words is "one million, nine hundred eighty-two thousand, three hundred five".