3865761642 has 16 divisors (see below), whose sum is σ = 7766196480. Its totient is φ = 1282808352.

The previous prime is 3865761611. The next prime is 3865761643. The reversal of 3865761642 is 2461675683.

It is a super-2 number, since 2×3865761642² = 29888226145517072328, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3865761591 and 3865761600.

It is not an unprimeable number, because it can be changed into a prime (3865761643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1443267 + ... + 1445942.

It is an arithmetic number, because the mean of its divisors is an integer number (485387280).

Almost surely, 2^3865761642 is an apocalyptic number.

3865761642 is an abundant number, since it is smaller than the sum of its proper divisors (3900434838).

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

3865761642 is a wasteful number, since it uses less digits than its factorization.

3865761642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2889437.

The product of its digits is 1451520, while the sum is 48.

The square root of 3865761642 is about 62175.2494325515. The cubic root of 3865761642 is about 1569.4411093032.

The spelling of 3865761642 in words is "three billion, eight hundred sixty-five million, seven hundred sixty-one thousand, six hundred forty-two".