3894870889 has 12 divisors (see below), whose sum is σ = 4879289604. Its totient is φ = 3081655584.

The previous prime is 3894870887. The next prime is 3894870893. The reversal of 3894870889 is 9880784983.

It can be written as a sum of positive squares in 2 ways, for example, as 1731225664 + 2163645225 = 41608^2 + 46515^2 .

It is not a de Polignac number, because 3894870889 - 2¹ = 3894870887 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3894870889.

It is not an unprimeable number, because it can be changed into a prime (3894870887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3056562 + ... + 3057835.

It is an arithmetic number, because the mean of its divisors is an integer number (406607467).

Almost surely, 2^3894870889 is an apocalyptic number.

It is an amenable number.

3894870889 is a deficient number, since it is larger than the sum of its proper divisors (984418715).

3894870889 is a wasteful number, since it uses less digits than its factorization.

3894870889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6114424 (or 6114417 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 64.

The square root of 3894870889 is about 62408.9007193685. The cubic root of 3894870889 is about 1573.3705683348.

The spelling of 3894870889 in words is "three billion, eight hundred ninety-four million, eight hundred seventy thousand, eight hundred eighty-nine".