3128198401 has 4 divisors (see below), whose sum is σ = 3179480404. Its totient is φ = 3076916400.

The previous prime is 3128198377. The next prime is 3128198413. The reversal of 3128198401 is 1048918213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 790959376 + 2337239025 = 28124^2 + 48345^2 .

It is a cyclic number.

It is not a de Polignac number, because 3128198401 - 2⁹ = 3128197889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3128195401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25640910 + ... + 25641031.

It is an arithmetic number, because the mean of its divisors is an integer number (794870101).

Almost surely, 2^3128198401 is an apocalyptic number.

It is an amenable number.

3128198401 is a deficient number, since it is larger than the sum of its proper divisors (51282003).

3128198401 is an equidigital number, since it uses as much as digits as its factorization.

3128198401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51282002.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 3128198401 is about 55930.2994896326. The cubic root of 3128198401 is about 1462.5074820374.

The spelling of 3128198401 in words is "three billion, one hundred twenty-eight million, one hundred ninety-eight thousand, four hundred one".