3865128368 has 10 divisors (see below), whose sum is σ = 7488686244. Its totient is φ = 1932564176.

The previous prime is 3865128367. The next prime is 3865128413. The reversal of 3865128368 is 8638215683.

It is a super-2 number, since 2×3865128368² = 29878434602236686848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3865128367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120785246 + ... + 120785277.

Almost surely, 2^3865128368 is an apocalyptic number.

It is an amenable number.

3865128368 is a deficient number, since it is larger than the sum of its proper divisors (3623557876).

3865128368 is a wasteful number, since it uses less digits than its factorization.

3865128368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241570531 (or 241570525 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 50.

The square root of 3865128368 is about 62170.1565704961. The cubic root of 3865128368 is about 1569.3554047153.

The spelling of 3865128368 in words is "three billion, eight hundred sixty-five million, one hundred twenty-eight thousand, three hundred sixty-eight".