3840538749 has 4 divisors (see below), whose sum is σ = 5120718336. Its totient is φ = 2560359164.

The previous prime is 3840538747. The next prime is 3840538763. The reversal of 3840538749 is 9478350483.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3840538749 - 2¹ = 3840538747 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3840538747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640089789 + ... + 640089794.

It is an arithmetic number, because the mean of its divisors is an integer number (1280179584).

Almost surely, 2^3840538749 is an apocalyptic number.

It is an amenable number.

3840538749 is a deficient number, since it is larger than the sum of its proper divisors (1280179587).

3840538749 is a wasteful number, since it uses less digits than its factorization.

3840538749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1280179586.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The square root of 3840538749 is about 61972.0803991604. The cubic root of 3840538749 is about 1566.0202867591.

The spelling of 3840538749 in words is "three billion, eight hundred forty million, five hundred thirty-eight thousand, seven hundred forty-nine".