1868317884 has 72 divisors (see below), whose sum is σ = 5010537168. Its totient is φ = 584962560.

The previous prime is 1868317819. The next prime is 1868317903. The reversal of 1868317884 is 4887138681.

It is a happy number.

It is a super-2 number, since 2×1868317884² = 6981223431348474912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1868317884.

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 23 ways as a sum of consecutive naturals, for example, 331974 + ... + 337554.

It is an arithmetic number, because the mean of its divisors is an integer number (69590794).

Almost surely, 2^1868317884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868317884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505268584).

1868317884 is an abundant number, since it is smaller than the sum of its proper divisors (3142219284).

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

1868317884 is a wasteful number, since it uses less digits than its factorization.

1868317884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6155 (or 6150 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 1868317884 is about 43224.0428928160. The cubic root of 1868317884 is about 1231.6394477828.

The spelling of 1868317884 in words is "one billion, eight hundred sixty-eight million, three hundred seventeen thousand, eight hundred eighty-four".