3997858885 has 4 divisors (see below), whose sum is σ = 4797430668. Its totient is φ = 3198287104.

The previous prime is 3997858883. The next prime is 3997858889. The reversal of 3997858885 is 5888587993.

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 3175660609 + 822198276 = 56353^2 + 28674^2 .

It is a cyclic number.

It is not a de Polignac number, because 3997858885 - 2¹ = 3997858883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997858883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 399785884 + ... + 399785893.

It is an arithmetic number, because the mean of its divisors is an integer number (1199357667).

Almost surely, 2^3997858885 is an apocalyptic number.

It is an amenable number.

3997858885 is a deficient number, since it is larger than the sum of its proper divisors (799571783).

3997858885 is an equidigital number, since it uses as much as digits as its factorization.

3997858885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799571782.

The product of its digits is 174182400, while the sum is 70.

The square root of 3997858885 is about 63228.6239372644. The cubic root of 3997858885 is about 1587.1177673998.

The spelling of 3997858885 in words is "three billion, nine hundred ninety-seven million, eight hundred fifty-eight thousand, eight hundred eighty-five".