1855338868 has 12 divisors (see below), whose sum is σ = 3257087652. Its totient is φ = 924742400.

The previous prime is 1855338857. The next prime is 1855338883. The reversal of 1855338868 is 8688335581.

It can be written as a sum of positive squares in 2 ways, for example, as 903122704 + 952216164 = 30052^2 + 30858^2 .

It is a super-2 number, since 2×1855338868² = 6884564630223042848, which contains 22 as substring.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 730333 + ... + 732868.

It is an arithmetic number, because the mean of its divisors is an integer number (271423971).

Almost surely, 2^1855338868 is an apocalyptic number.

It is an amenable number.

1855338868 is a deficient number, since it is larger than the sum of its proper divisors (1401748784).

1855338868 is a wasteful number, since it uses less digits than its factorization.

1855338868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463522 (or 1463520 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 55.

The square root of 1855338868 is about 43073.6447029968. The cubic root of 1855338868 is about 1228.7807929039.

The spelling of 1855338868 in words is "one billion, eight hundred fifty-five million, three hundred thirty-eight thousand, eight hundred sixty-eight".