1868388424 has 24 divisors (see below), whose sum is σ = 4075184790. Its totient is φ = 800737728.

The previous prime is 1868388419. The next prime is 1868388433. The reversal of 1868388424 is 4248838681.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1867795524 + 592900 = 43218^2 + 770^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2382757 + ... + 2383540.

Almost surely, 2^1868388424 is an apocalyptic number.

1868388424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1868388424 is an abundant number, since it is smaller than the sum of its proper divisors (2206796366).

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

1868388424 is a wasteful number, since it uses less digits than its factorization.

1868388424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4766317 (or 4766306 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 52.

The square root of 1868388424 is about 43224.8588661664. The cubic root of 1868388424 is about 1231.6549481346.

The spelling of 1868388424 in words is "one billion, eight hundred sixty-eight million, three hundred eighty-eight thousand, four hundred twenty-four".