1828649 has 2 divisors, whose sum is σ = 1828650. Its totient is φ = 1828648.

The previous prime is 1828637. The next prime is 1828663. The reversal of 1828649 is 9468281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1338649 + 490000 = 1157^2 + 700^2 .

It is a cyclic number.

It is not a de Polignac number, because 1828649 - 2⁴ = 1828633 is a prime.

It is not a weakly prime, because it can be changed into another prime (1828609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914324 + 914325.

It is an arithmetic number, because the mean of its divisors is an integer number (914325).

2^1828649 is an apocalyptic number.

It is an amenable number.

1828649 is a deficient number, since it is larger than the sum of its proper divisors (1).

1828649 is an equidigital number, since it uses as much as digits as its factorization.

1828649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 1828649 is about 1352.2754896840. The cubic root of 1828649 is about 122.2860126449.

The spelling of 1828649 in words is "one million, eight hundred twenty-eight thousand, six hundred forty-nine".