3998447709 has 8 divisors (see below), whose sum is σ = 5378443392. Its totient is φ = 2642041920.

The previous prime is 3998447701. The next prime is 3998447711. The reversal of 3998447709 is 9077448993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3998447709 - 2³ = 3998447701 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998447701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5897077 + ... + 5897754.

It is an arithmetic number, because the mean of its divisors is an integer number (672305424).

Almost surely, 2^3998447709 is an apocalyptic number.

It is an amenable number.

3998447709 is a deficient number, since it is larger than the sum of its proper divisors (1379995683).

3998447709 is a wasteful number, since it uses less digits than its factorization.

3998447709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11794947.

The product of its (nonzero) digits is 13716864, while the sum is 60.

The square root of 3998447709 is about 63233.2800746569. The cubic root of 3998447709 is about 1587.1956830360.

The spelling of 3998447709 in words is "three billion, nine hundred ninety-eight million, four hundred forty-seven thousand, seven hundred nine".