1982387 has 8 divisors (see below), whose sum is σ = 2290032. Its totient is φ = 1696000.

The previous prime is 1982381. The next prime is 1982401. The reversal of 1982387 is 7832891.

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 1982387 - 2⁴ = 1982371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1982387.

It is not an unprimeable number, because it can be changed into a prime (1982381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5114 + ... + 5487.

It is an arithmetic number, because the mean of its divisors is an integer number (286254).

2^1982387 is an apocalyptic number.

1982387 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1982387 is a deficient number, since it is larger than the sum of its proper divisors (307645).

1982387 is a wasteful number, since it uses less digits than its factorization.

1982387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10629.

The product of its digits is 24192, while the sum is 38.

The square root of 1982387 is about 1407.9726559845. The cubic root of 1982387 is about 125.6211641280.

The spelling of 1982387 in words is "one million, nine hundred eighty-two thousand, three hundred eighty-seven".