3877691646 has 32 divisors (see below), whose sum is σ = 8183145600. Its totient is φ = 1221596640.

The previous prime is 3877691593. The next prime is 3877691689. The reversal of 3877691646 is 6461967783.

It is a Harshad number since it is a multiple of its sum of digits (57).

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 15 ways as a sum of consecutive naturals, for example, 7176 + ... + 88356.

It is an arithmetic number, because the mean of its divisors is an integer number (255723300).

Almost surely, 2^3877691646 is an apocalyptic number.

3877691646 is an abundant number, since it is smaller than the sum of its proper divisors (4305453954).

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

3877691646 is a wasteful number, since it uses less digits than its factorization.

3877691646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81624.

The product of its digits is 9144576, while the sum is 57.

The square root of 3877691646 is about 62271.1140578037. The cubic root of 3877691646 is about 1571.0539187826.

The spelling of 3877691646 in words is "three billion, eight hundred seventy-seven million, six hundred ninety-one thousand, six hundred forty-six".