3888722869 has 4 divisors (see below), whose sum is σ = 3900262444. Its totient is φ = 3877183296.

The previous prime is 3888722867. The next prime is 3888722881. The reversal of 3888722869 is 9682278883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9682278883 = 3911 ⋅2475653.

It can be written as a sum of positive squares in 2 ways, for example, as 434222244 + 3454500625 = 20838^2 + 58775^2 .

It is a cyclic number.

It is not a de Polignac number, because 3888722869 - 2¹ = 3888722867 is a prime.

It is a super-2 number, since 2×3888722869² = 30244331103767182322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3888722867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5769282 + ... + 5769955.

It is an arithmetic number, because the mean of its divisors is an integer number (975065611).

Almost surely, 2^3888722869 is an apocalyptic number.

It is an amenable number.

3888722869 is a deficient number, since it is larger than the sum of its proper divisors (11539575).

3888722869 is a wasteful number, since it uses less digits than its factorization.

3888722869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11539574.

The product of its digits is 18579456, while the sum is 61.

The square root of 3888722869 is about 62359.6253115748. The cubic root of 3888722869 is about 1572.5422817576.

The spelling of 3888722869 in words is "three billion, eight hundred eighty-eight million, seven hundred twenty-two thousand, eight hundred sixty-nine".