1827428605 has 8 divisors (see below), whose sum is σ = 2234290392. Its totient is φ = 1434358848.

The previous prime is 1827428567. The next prime is 1827428611. The reversal of 1827428605 is 5068247281.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 986776569 + 840652036 = 31413^2 + 28994^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1827428605 - 2²⁷ = 1693210877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3447714 + ... + 3448243.

It is an arithmetic number, because the mean of its divisors is an integer number (279286299).

Almost surely, 2^1827428605 is an apocalyptic number.

It is an amenable number.

1827428605 is a deficient number, since it is larger than the sum of its proper divisors (406861787).

1827428605 is an equidigital number, since it uses as much as digits as its factorization.

1827428605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6896015.

The product of its (nonzero) digits is 215040, while the sum is 43.

The square root of 1827428605 is about 42748.4339479238. The cubic root of 1827428605 is about 1222.5880304010.

The spelling of 1827428605 in words is "one billion, eight hundred twenty-seven million, four hundred twenty-eight thousand, six hundred five".