3991339512 has 48 divisors (see below), whose sum is σ = 10881496080. Its totient is φ = 1321632000.

The previous prime is 3991339447. The next prime is 3991339531. The reversal of 3991339512 is 2159331993.

It is a happy number.

3991339512 is a `hidden beast` number, since 3 + 99 + 13 + 39 + 512 = 666.

It is a super-2 number, since 2×3991339512² = 31861582200104796288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172689 + ... + 194432.

It is an arithmetic number, because the mean of its divisors is an integer number (226697835).

Almost surely, 2^3991339512 is an apocalyptic number.

It is an amenable number.

3991339512 is an abundant number, since it is smaller than the sum of its proper divisors (6890156568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3991339512 is a wasteful number, since it uses less digits than its factorization.

3991339512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367284 (or 367277 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 3991339512 is about 63177.0489339285. The cubic root of 3991339512 is about 1586.2545851760.

The spelling of 3991339512 in words is "three billion, nine hundred ninety-one million, three hundred thirty-nine thousand, five hundred twelve".