3866238081 has 32 divisors (see below), whose sum is σ = 5858928000. Its totient is φ = 2518979904.

The previous prime is 3866238043. The next prime is 3866238127. The reversal of 3866238081 is 1808326683.

It is not a de Polignac number, because 3866238081 - 2⁶ = 3866238017 is a prime.

It is a super-2 number, since 2×3866238081² = 29895593797949125122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3866238041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 268575 + ... + 282603.

It is an arithmetic number, because the mean of its divisors is an integer number (183091500).

Almost surely, 2^3866238081 is an apocalyptic number.

It is an amenable number.

3866238081 is a deficient number, since it is larger than the sum of its proper divisors (1992689919).

3866238081 is a wasteful number, since it uses less digits than its factorization.

3866238081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14270 (or 14264 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 3866238081 is about 62179.0807346008. The cubic root of 3866238081 is about 1569.5055823450.

The spelling of 3866238081 in words is "three billion, eight hundred sixty-six million, two hundred thirty-eight thousand, eighty-one".