398822618 has 16 divisors (see below), whose sum is σ = 638055144. Its totient is φ = 186309120.

The previous prime is 398822591. The next prime is 398822663. The reversal of 398822618 is 816228893.

It can be written as a sum of positive squares in 4 ways, for example, as 397483969 + 1338649 = 19937^2 + 1157^2 .

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, 38153 + ... + 47468.

Almost surely, 2^398822618 is an apocalyptic number.

398822618 is a deficient number, since it is larger than the sum of its proper divisors (239232526).

398822618 is a wasteful number, since it uses less digits than its factorization.

398822618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85777.

The product of its digits is 331776, while the sum is 47.

The square root of 398822618 is about 19970.5437582455. The cubic root of 398822618 is about 736.0826705440.

The spelling of 398822618 in words is "three hundred ninety-eight million, eight hundred twenty-two thousand, six hundred eighteen".