3879889864 has 8 divisors (see below), whose sum is σ = 7274793510. Its totient is φ = 1939944928.

The previous prime is 3879889861. The next prime is 3879889883. The reversal of 3879889864 is 4689889783.

3879889864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2211820900 + 1668068964 = 47030^2 + 40842^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 3879889793 and 3879889802.

It is not an unprimeable number, because it can be changed into a prime (3879889861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 242493109 + ... + 242493124.

Almost surely, 2^3879889864 is an apocalyptic number.

It is an amenable number.

3879889864 is a deficient number, since it is larger than the sum of its proper divisors (3394903646).

3879889864 is a wasteful number, since it uses less digits than its factorization.

3879889864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484986239 (or 484986235 counting only the distinct ones).

The product of its digits is 167215104, while the sum is 70.

The square root of 3879889864 is about 62288.7619398556. The cubic root of 3879889864 is about 1571.3507333944.

The spelling of 3879889864 in words is "three billion, eight hundred seventy-nine million, eight hundred eighty-nine thousand, eight hundred sixty-four".