1830649 has 4 divisors (see below), whose sum is σ = 1880164. Its totient is φ = 1781136.

The previous prime is 1830637. The next prime is 1830659. The reversal of 1830649 is 9460381.

1830649 is nontrivially palindromic in base 4.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 765625 = 1032^2 + 875^2 .

It is a cyclic number.

It is not a de Polignac number, because 1830649 - 2⁵ = 1830617 is a prime.

It is a super-2 number, since 2×1830649² = 6702551522402, which contains 22 as substring.

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 1830649.

It is not an unprimeable number, because it can be changed into a prime (1830629) 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, 24702 + ... + 24775.

It is an arithmetic number, because the mean of its divisors is an integer number (470041).

2^1830649 is an apocalyptic number.

It is an amenable number.

1830649 is a deficient number, since it is larger than the sum of its proper divisors (49515).

1830649 is an equidigital number, since it uses as much as digits as its factorization.

1830649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49514.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 1830649 is about 1353.0147818853. The cubic root of 1830649 is about 122.3305779526.

The spelling of 1830649 in words is "one million, eight hundred thirty thousand, six hundred forty-nine".