1820782 has 8 divisors (see below), whose sum is σ = 2739456. Its totient is φ = 907632.

The previous prime is 1820773. The next prime is 1820783. The reversal of 1820782 is 2870281.

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

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 1820782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 423 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (342432).

2^1820782 is an apocalyptic number.

1820782 is a deficient number, since it is larger than the sum of its proper divisors (918674).

1820782 is a wasteful number, since it uses less digits than its factorization.

1820782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2762.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 1820782 is about 1349.3635536800. The cubic root of 1820782 is about 122.1103990385.

The spelling of 1820782 in words is "one million, eight hundred twenty thousand, seven hundred eighty-two".