3998084805 has 128 divisors (see below), whose sum is σ = 8467683840. Its totient is φ = 1764218880.

The previous prime is 3998084777. The next prime is 3998084809. The reversal of 3998084805 is 5084808993.

It is a happy number.

It is not a de Polignac number, because 3998084805 - 2⁵ = 3998084773 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 (3998084809) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1407847 + ... + 1410683.

It is an arithmetic number, because the mean of its divisors is an integer number (66153780).

Almost surely, 2^3998084805 is an apocalyptic number.

It is an amenable number.

3998084805 is an abundant number, since it is smaller than the sum of its proper divisors (4469599035).

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

3998084805 is a wasteful number, since it uses less digits than its factorization.

3998084805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948 (or 2942 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 3998084805 is about 63230.4104446587. The cubic root of 3998084805 is about 1587.1476629766.

The spelling of 3998084805 in words is "three billion, nine hundred ninety-eight million, eighty-four thousand, eight hundred five".