1820716 has 12 divisors (see below), whose sum is σ = 3197320. Its totient is φ = 907200.

The previous prime is 1820711. The next prime is 1820737. The reversal of 1820716 is 6170281.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

1820716 is a Rhonda number in base 16.

It is not an unprimeable number, because it can be changed into a prime (1820711) 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, 916 + ... + 2116.

2^1820716 is an apocalyptic number.

It is an amenable number.

1820716 is a deficient number, since it is larger than the sum of its proper divisors (1376604).

1820716 is a wasteful number, since it uses less digits than its factorization.

1820716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584 (or 1582 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 1820716 is about 1349.3390974844. The cubic root of 1820716 is about 122.1089235948.

Adding to 1820716 its reverse (6170281), we get a palindrome (7990997).

The spelling of 1820716 in words is "one million, eight hundred twenty thousand, seven hundred sixteen".