3856365640 has 16 divisors (see below), whose sum is σ = 8676822780. Its totient is φ = 1542546240.

The previous prime is 3856365637. The next prime is 3856365661. The reversal of 3856365640 is 465636583.

It can be written as a sum of positive squares in 2 ways, for example, as 3825917316 + 30448324 = 61854^2 + 5518^2 .

It is a super-3 number, since 3×3856365640³ (a number of 30 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 48204531 + ... + 48204610.

Almost surely, 2^3856365640 is an apocalyptic number.

It is an amenable number.

3856365640 is an abundant number, since it is smaller than the sum of its proper divisors (4820457140).

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

3856365640 is a wasteful number, since it uses less digits than its factorization.

3856365640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96409152 (or 96409148 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 46.

The square root of 3856365640 is about 62099.6428331114. The cubic root of 3856365640 is about 1568.1685325324.

The spelling of 3856365640 in words is "three billion, eight hundred fifty-six million, three hundred sixty-five thousand, six hundred forty".