3865744386 has 64 divisors (see below), whose sum is σ = 10083144960. Its totient is φ = 1074643200.

The previous prime is 3865744381. The next prime is 3865744447. The reversal of 3865744386 is 6834475683.

3865744386 is a `hidden beast` number, since 38 + 6 + 574 + 4 + 38 + 6 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (3865744381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124215 + ... + 152186.

It is an arithmetic number, because the mean of its divisors is an integer number (157549140).

Almost surely, 2^3865744386 is an apocalyptic number.

3865744386 is an abundant number, since it is smaller than the sum of its proper divisors (6217400574).

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

3865744386 is a wasteful number, since it uses less digits than its factorization.

3865744386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276456 (or 276450 counting only the distinct ones).

The product of its digits is 11612160, while the sum is 54.

The square root of 3865744386 is about 62175.1106633515. The cubic root of 3865744386 is about 1569.4387740742.

The spelling of 3865744386 in words is "three billion, eight hundred sixty-five million, seven hundred forty-four thousand, three hundred eighty-six".