398573218 has 16 divisors (see below), whose sum is σ = 621591264. Its totient is φ = 191521440.

The previous prime is 398573171. The next prime is 398573237. The reversal of 398573218 is 812375893.

It is a super-2 number, since 2×398573218² = 317721220213751048, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30780 + ... + 41767.

It is an arithmetic number, because the mean of its divisors is an integer number (38849454).

Almost surely, 2^398573218 is an apocalyptic number.

398573218 is a deficient number, since it is larger than the sum of its proper divisors (223018046).

398573218 is a wasteful number, since it uses less digits than its factorization.

398573218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72657.

The product of its digits is 362880, while the sum is 46.

The square root of 398573218 is about 19964.2985852246. The cubic root of 398573218 is about 735.9292044085.

The spelling of 398573218 in words is "three hundred ninety-eight million, five hundred seventy-three thousand, two hundred eighteen".