1820704 has 12 divisors (see below), whose sum is σ = 3584574. Its totient is φ = 910336.

The previous prime is 1820701. The next prime is 1820711. The reversal of 1820704 is 4070281.

It can be written as a sum of positive squares in only one way, i.e., 1817104 + 3600 = 1348^2 + 60^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28417 + ... + 28480.

2^1820704 is an apocalyptic number.

It is an amenable number.

1820704 is a deficient number, since it is larger than the sum of its proper divisors (1763870).

1820704 is an equidigital number, since it uses as much as digits as its factorization.

1820704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56907 (or 56899 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1820704 is about 1349.3346508557. The cubic root of 1820704 is about 122.1086553285.

Adding to 1820704 its reverse (4070281), we get a palindrome (5890985).

The spelling of 1820704 in words is "one million, eight hundred twenty thousand, seven hundred four".