3989567138 has 18 divisors (see below), whose sum is σ = 6095551761. Its totient is φ = 1958383224.

The previous prime is 3989567137. The next prime is 3989567147. The reversal of 3989567138 is 8317659893.

It can be written as a sum of positive squares in 2 ways, for example, as 3933422089 + 56145049 = 62717^2 + 7493^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=44663.

It is a super-2 number, since 2×3989567138² = 31833291897219022088, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3989567137) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5269856 + ... + 5270612.

Almost surely, 2^3989567138 is an apocalyptic number.

3989567138 is a deficient number, since it is larger than the sum of its proper divisors (2105984623).

3989567138 is an frugal number, since it uses more digits than its factorization.

3989567138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634 (or 818 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 59.

The square root of 3989567138 is about 63163.0203362695. The cubic root of 3989567138 is about 1586.0197556890.

The spelling of 3989567138 in words is "three billion, nine hundred eighty-nine million, five hundred sixty-seven thousand, one hundred thirty-eight".