1827863885 has 16 divisors (see below), whose sum is σ = 2323742256. Its totient is φ = 1375515648.

The previous prime is 1827863879. The next prime is 1827863903. The reversal of 1827863885 is 5883687281.

It can be written as a sum of positive squares in 8 ways, for example, as 577392841 + 1250471044 = 24029^2 + 35362^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1827863885 is a prime.

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 1827863885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185339 + ... + 194951.

It is an arithmetic number, because the mean of its divisors is an integer number (145233891).

Almost surely, 2^1827863885 is an apocalyptic number.

It is an amenable number.

1827863885 is a deficient number, since it is larger than the sum of its proper divisors (495878371).

1827863885 is a wasteful number, since it uses less digits than its factorization.

1827863885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11872.

The product of its digits is 5160960, while the sum is 56.

The square root of 1827863885 is about 42753.5248254457. The cubic root of 1827863885 is about 1222.6850931753.

The spelling of 1827863885 in words is "one billion, eight hundred twenty-seven million, eight hundred sixty-three thousand, eight hundred eighty-five".