398836461860 has 24 divisors (see below), whose sum is σ = 845849213496. Its totient is φ = 157955033600.

The previous prime is 398836461839. The next prime is 398836461869. The reversal of 398836461860 is 68164638893.

It can be written as a sum of positive squares in 4 ways, for example, as 24069660736 + 374766801124 = 155144^2 + 612182^2 .

It is a junction number, because it is equal to n+sod(n) for n = 398836461793 and 398836461802.

It is not an unprimeable number, because it can be changed into a prime (398836461869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98719877 + ... + 98723916.

It is an arithmetic number, because the mean of its divisors is an integer number (35243717229).

Almost surely, 2^398836461860 is an apocalyptic number.

It is an amenable number.

398836461860 is an abundant number, since it is smaller than the sum of its proper divisors (447012751636).

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

398836461860 is a wasteful number, since it uses less digits than its factorization.

398836461860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197443903 (or 197443901 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 62.

The spelling of 398836461860 in words is "three hundred ninety-eight billion, eight hundred thirty-six million, four hundred sixty-one thousand, eight hundred sixty".