1827427805 has 12 divisors (see below), whose sum is σ = 2550940380. Its totient is φ = 1253093184.

The previous prime is 1827427759. The next prime is 1827427841. The reversal of 1827427805 is 5087247281.

It can be written as a sum of positive squares in 2 ways, for example, as 773841124 + 1053586681 = 27818^2 + 32459^2 .

It is not a de Polignac number, because 1827427805 - 2⁶ = 1827427741 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 3729200 + ... + 3729689.

It is an arithmetic number, because the mean of its divisors is an integer number (212578365).

Almost surely, 2^1827427805 is an apocalyptic number.

It is an amenable number.

1827427805 is a deficient number, since it is larger than the sum of its proper divisors (723512575).

1827427805 is an equidigital number, since it uses as much as digits as its factorization.

1827427805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458908 (or 7458901 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 44.

The square root of 1827427805 is about 42748.4245908548. The cubic root of 1827427805 is about 1222.5878519954.

The spelling of 1827427805 in words is "one billion, eight hundred twenty-seven million, four hundred twenty-seven thousand, eight hundred five".