398640322 has 8 divisors (see below), whose sum is σ = 618579900. Its totient is φ = 192447024.

The previous prime is 398640317. The next prime is 398640353. The reversal of 398640322 is 223046893.

It can be written as a sum of positive squares in 2 ways, for example, as 361418121 + 37222201 = 19011^2 + 6101^2 .

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

It is an unprimeable number.

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, 3436497 + ... + 3436612.

Almost surely, 2^398640322 is an apocalyptic number.

398640322 is a deficient number, since it is larger than the sum of its proper divisors (219939578).

398640322 is a wasteful number, since it uses less digits than its factorization.

398640322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873140.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 398640322 is about 19965.9791144837. The cubic root of 398640322 is about 735.9705025690.

The spelling of 398640322 in words is "three hundred ninety-eight million, six hundred forty thousand, three hundred twenty-two".