2385865638 has 32 divisors (see below), whose sum is σ = 5709765600. Its totient is φ = 734112288.

The previous prime is 2385865633. The next prime is 2385865673. The reversal of 2385865638 is 8365685832.

2385865638 is a `hidden beast` number, since 2 + 3 + 8 + 586 + 56 + 3 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2385865633) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1698633 + ... + 1700036.

It is an arithmetic number, because the mean of its divisors is an integer number (178430175).

Almost surely, 2^2385865638 is an apocalyptic number.

2385865638 is an abundant number, since it is smaller than the sum of its proper divisors (3323899962).

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

2385865638 is a wasteful number, since it uses less digits than its factorization.

2385865638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398693 (or 3398687 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The square root of 2385865638 is about 48845.3236042101. The cubic root of 2385865638 is about 1336.2323880567.

The spelling of 2385865638 in words is "two billion, three hundred eighty-five million, eight hundred sixty-five thousand, six hundred thirty-eight".