3861870640 has 20 divisors (see below), whose sum is σ = 8978849424. Its totient is φ = 1544748224.

The previous prime is 3861870611. The next prime is 3861870679. The reversal of 3861870640 is 460781683.

3861870640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24136612 + ... + 24136771.

Almost surely, 2^3861870640 is an apocalyptic number.

It is an amenable number.

3861870640 is an abundant number, since it is smaller than the sum of its proper divisors (5116978784).

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

3861870640 is a wasteful number, since it uses less digits than its factorization.

3861870640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48273396 (or 48273390 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 3861870640 is about 62143.9509526068. The cubic root of 3861870640 is about 1568.9143697657.

The spelling of 3861870640 in words is "three billion, eight hundred sixty-one million, eight hundred seventy thousand, six hundred forty".