3997739216 has 20 divisors (see below), whose sum is σ = 7747343424. Its totient is φ = 1998424800.

The previous prime is 3997739201. The next prime is 3997739267. The reversal of 3997739216 is 6129377993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53561 + ... + 104231.

Almost surely, 2^3997739216 is an apocalyptic number.

It is an amenable number.

3997739216 is a deficient number, since it is larger than the sum of its proper divisors (3749604208).

3997739216 is a wasteful number, since it uses less digits than its factorization.

3997739216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55610 (or 55604 counting only the distinct ones).

The product of its digits is 3857868, while the sum is 56.

The square root of 3997739216 is about 63227.6776103630. The cubic root of 3997739216 is about 1587.1019313655.

The spelling of 3997739216 in words is "three billion, nine hundred ninety-seven million, seven hundred thirty-nine thousand, two hundred sixteen".