1868388425 has 6 divisors (see below), whose sum is σ = 2316801678. Its totient is φ = 1494710720.

The previous prime is 1868388419. The next prime is 1868388433. The reversal of 1868388425 is 5248838681.

It can be written as a sum of positive squares in 3 ways, for example, as 31494544 + 1836893881 = 5612^2 + 42859^2 .

It is not a de Polignac number, because 1868388425 - 2¹⁶ = 1868322889 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 37367744 + ... + 37367793.

It is an arithmetic number, because the mean of its divisors is an integer number (386133613).

Almost surely, 2^1868388425 is an apocalyptic number.

It is an amenable number.

1868388425 is a deficient number, since it is larger than the sum of its proper divisors (448413253).

1868388425 is an equidigital number, since it uses as much as digits as its factorization.

1868388425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74735547 (or 74735542 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The square root of 1868388425 is about 43224.8588777338. The cubic root of 1868388425 is about 1231.6549483543.

The spelling of 1868388425 in words is "one billion, eight hundred sixty-eight million, three hundred eighty-eight thousand, four hundred twenty-five".