3990838436217 has 16 divisors (see below), whose sum is σ = 5912660208000. Its totient is φ = 2660420821392.

The previous prime is 3990838436201. The next prime is 3990838436231. The reversal of 3990838436217 is 7126348380993.

3990838436217 is a `hidden beast` number, since 3 + 9 + 9 + 0 + 8 + 384 + 36 + 217 = 666.

It is not a de Polignac number, because 3990838436217 - 2⁴ = 3990838436201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3990838476217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3306117 + ... + 4348802.

It is an arithmetic number, because the mean of its divisors is an integer number (369541263000).

Almost surely, 2^{3990838436217} is an apocalyptic number.

It is an amenable number.

3990838436217 is a deficient number, since it is larger than the sum of its proper divisors (1921821771783).

3990838436217 is a wasteful number, since it uses less digits than its factorization.

3990838436217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7674237 (or 7674231 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 63.

The spelling of 3990838436217 in words is "three trillion, nine hundred ninety billion, eight hundred thirty-eight million, four hundred thirty-six thousand, two hundred seventeen".