3856649472 has 108 divisors (see below), whose sum is σ = 11975123524. Its totient is φ = 1186652160.

The previous prime is 3856649443. The next prime is 3856649483. The reversal of 3856649472 is 2749466583.

3856649472 is a `hidden beast` number, since 3 + 8 + 566 + 4 + 9 + 4 + 72 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2203739136 + 1652910336 = 46944^2 + 40656^2 .

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 34429 + ... + 94332.

Almost surely, 2^3856649472 is an apocalyptic number.

3856649472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3856649472 is an abundant number, since it is smaller than the sum of its proper divisors (8118474052).

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

3856649472 is a wasteful number, since it uses less digits than its factorization.

3856649472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128796 (or 128779 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 54.

The square root of 3856649472 is about 62101.9280860103. The cubic root of 3856649472 is about 1568.2070044628.

The spelling of 3856649472 in words is "three billion, eight hundred fifty-six million, six hundred forty-nine thousand, four hundred seventy-two".