3998366401 has 8 divisors (see below), whose sum is σ = 4014287784. Its totient is φ = 3982471680.

The previous prime is 3998366399. The next prime is 3998366429. The reversal of 3998366401 is 1046638993.

3998366401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13727025 + 3984639376 = 3705^2 + 63124^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 3998366401 - 2¹ = 3998366399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998366431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 326155 + ... + 338191.

It is an arithmetic number, because the mean of its divisors is an integer number (501785973).

Almost surely, 2^3998366401 is an apocalyptic number.

It is an amenable number.

3998366401 is a deficient number, since it is larger than the sum of its proper divisors (15921383).

3998366401 is a wasteful number, since it uses less digits than its factorization.

3998366401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13331.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 3998366401 is about 63232.6371504463. The cubic root of 3998366401 is about 1587.1849244791.

The spelling of 3998366401 in words is "three billion, nine hundred ninety-eight million, three hundred sixty-six thousand, four hundred one".