3856761687 has 8 divisors (see below), whose sum is σ = 5142639600. Its totient is φ = 2571029120.

The previous prime is 3856761679. The next prime is 3856761691. The reversal of 3856761687 is 7861676583.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3856761687 - 2³ = 3856761679 is a prime.

It is a super-2 number, since 2×3856761687² = 29749221420622171938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856761697) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 70237 + ... + 112457.

It is an arithmetic number, because the mean of its divisors is an integer number (642829950).

Almost surely, 2^3856761687 is an apocalyptic number.

3856761687 is a deficient number, since it is larger than the sum of its proper divisors (1285877913).

3856761687 is a wasteful number, since it uses less digits than its factorization.

3856761687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72673.

The product of its digits is 10160640, while the sum is 57.

The square root of 3856761687 is about 62102.8315538028. The cubic root of 3856761687 is about 1568.2222140934. Note that the first 4 decimals are identical.

The spelling of 3856761687 in words is "three billion, eight hundred fifty-six million, seven hundred sixty-one thousand, six hundred eighty-seven".