398057222 has 4 divisors (see below), whose sum is σ = 597085836. Its totient is φ = 199028610.

The previous prime is 398057167. The next prime is 398057237. The reversal of 398057222 is 222750893.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99514304 + ... + 99514307.

It is an arithmetic number, because the mean of its divisors is an integer number (149271459).

Almost surely, 2^398057222 is an apocalyptic number.

398057222 is a deficient number, since it is larger than the sum of its proper divisors (199028614).

398057222 is a wasteful number, since it uses less digits than its factorization.

398057222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199028613.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 398057222 is about 19951.3714315583. The cubic root of 398057222 is about 735.6114873647.

The spelling of 398057222 in words is "three hundred ninety-eight million, fifty-seven thousand, two hundred twenty-two".