3997356885 has 20 divisors (see below), whose sum is σ = 7165633068. Its totient is φ = 2131923456.

The previous prime is 3997356859. The next prime is 3997356887. The reversal of 3997356885 is 5886537993.

It can be written as a sum of positive squares in 2 ways, for example, as 1349019441 + 2648337444 = 36729^2 + 51462^2 .

It is not a de Polignac number, because 3997356885 - 2¹⁶ = 3997291349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997356887) 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 19 ways as a sum of consecutive naturals, for example, 4934604 + ... + 4935413.

Almost surely, 2^3997356885 is an apocalyptic number.

It is an amenable number.

3997356885 is a deficient number, since it is larger than the sum of its proper divisors (3168276183).

3997356885 is an equidigital number, since it uses as much as digits as its factorization.

3997356885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9870034 (or 9870025 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 63.

The square root of 3997356885 is about 63224.6540915804. The cubic root of 3997356885 is about 1587.0513346340.

The spelling of 3997356885 in words is "three billion, nine hundred ninety-seven million, three hundred fifty-six thousand, eight hundred eighty-five".