3888870217 has 4 divisors (see below), whose sum is σ = 4022969220. Its totient is φ = 3754771216.

The previous prime is 3888870211. The next prime is 3888870221. The reversal of 3888870217 is 7120788883.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2559246921 + 1329623296 = 50589^2 + 36464^2 .

It is a cyclic number.

It is not a de Polignac number, because 3888870217 - 2¹¹ = 3888868169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3888870211) 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, 67049458 + ... + 67049515.

It is an arithmetic number, because the mean of its divisors is an integer number (1005742305).

Almost surely, 2^3888870217 is an apocalyptic number.

It is an amenable number.

3888870217 is a deficient number, since it is larger than the sum of its proper divisors (134099003).

3888870217 is a wasteful number, since it uses less digits than its factorization.

3888870217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134099002.

The product of its (nonzero) digits is 1204224, while the sum is 52.

The square root of 3888870217 is about 62360.8067378863. The cubic root of 3888870217 is about 1572.5621432941.

The spelling of 3888870217 in words is "three billion, eight hundred eighty-eight million, eight hundred seventy thousand, two hundred seventeen".