1868339556 has 18 divisors (see below), whose sum is σ = 4722747302. Its totient is φ = 622779840.

The previous prime is 1868339533. The next prime is 1868339567. The reversal of 1868339556 is 6559338681.

1868339556 is a `hidden beast` number, since 1 + 8 + 6 + 83 + 3 + 9 + 556 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1074790656 + 793548900 = 32784^2 + 28170^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25949125 + ... + 25949196.

Almost surely, 2^1868339556 is an apocalyptic number.

It is an amenable number.

1868339556 is an abundant number, since it is smaller than the sum of its proper divisors (2854407746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1868339556 is a wasteful number, since it uses less digits than its factorization.

1868339556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51898331 (or 51898326 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 1868339556 is about 43224.2935858991. The cubic root of 1868339556 is about 1231.6442099965.

The spelling of 1868339556 in words is "one billion, eight hundred sixty-eight million, three hundred thirty-nine thousand, five hundred fifty-six".