398030018 has 16 divisors (see below), whose sum is σ = 624754176. Its totient is φ = 189954720.

The previous prime is 398029997. The next prime is 398030023. The reversal of 398030018 is 810030893.

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, 39446 + ... + 48497.

It is an arithmetic number, because the mean of its divisors is an integer number (39047136).

Almost surely, 2^398030018 is an apocalyptic number.

398030018 is a deficient number, since it is larger than the sum of its proper divisors (226724158).

398030018 is a wasteful number, since it uses less digits than its factorization.

398030018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88049.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 398030018 is about 19950.6896622648. The cubic root of 398030018 is about 735.5947292793.

The spelling of 398030018 in words is "three hundred ninety-eight million, thirty thousand, eighteen".