398980929218 has 4 divisors (see below), whose sum is σ = 598471393830. Its totient is φ = 199490464608.

The previous prime is 398980929203. The next prime is 398980929239. The reversal of 398980929218 is 812929089893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812929089893 = 17 ⋅47819358229.

It can be written as a sum of positive squares in only one way, i.e., 375748158289 + 23232770929 = 612983^2 + 152423^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99745232303 + ... + 99745232306.

Almost surely, 2^398980929218 is an apocalyptic number.

398980929218 is a deficient number, since it is larger than the sum of its proper divisors (199490464612).

398980929218 is a wasteful number, since it uses less digits than its factorization.

398980929218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199490464611.

The product of its (nonzero) digits is 40310784, while the sum is 68.

The spelling of 398980929218 in words is "three hundred ninety-eight billion, nine hundred eighty million, nine hundred twenty-nine thousand, two hundred eighteen".