398132476285 has 4 divisors (see below), whose sum is σ = 477758971548. Its totient is φ = 318505981024.

The previous prime is 398132476267. The next prime is 398132476333. The reversal of 398132476285 is 582674231893.

It is a happy number.

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 154564563609 + 243567912676 = 393147^2 + 493526^2 .

It is a cyclic number.

It is not a de Polignac number, because 398132476285 - 2⁹ = 398132475773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39813247624 + ... + 39813247633.

It is an arithmetic number, because the mean of its divisors is an integer number (119439742887).

Almost surely, 2^398132476285 is an apocalyptic number.

It is an amenable number.

398132476285 is a deficient number, since it is larger than the sum of its proper divisors (79626495263).

398132476285 is an equidigital number, since it uses as much as digits as its factorization.

398132476285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79626495262.

The product of its digits is 17418240, while the sum is 58.

The spelling of 398132476285 in words is "three hundred ninety-eight billion, one hundred thirty-two million, four hundred seventy-six thousand, two hundred eighty-five".