1868387244 has 48 divisors (see below), whose sum is σ = 4816723968. Its totient is φ = 560674048.

The previous prime is 1868387243. The next prime is 1868387251. The reversal of 1868387244 is 4427838681.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (1868387243) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 194412 + ... + 203795.

It is an arithmetic number, because the mean of its divisors is an integer number (100348416).

Almost surely, 2^1868387244 is an apocalyptic number.

It is an amenable number.

1868387244 is an abundant number, since it is smaller than the sum of its proper divisors (2948336724).

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

1868387244 is a wasteful number, since it uses less digits than its factorization.

1868387244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398254 (or 398252 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 51.

The square root of 1868387244 is about 43224.8452166112. The cubic root of 1868387244 is about 1231.6546888464.

The spelling of 1868387244 in words is "one billion, eight hundred sixty-eight million, three hundred eighty-seven thousand, two hundred forty-four".