398172068 has 12 divisors (see below), whose sum is σ = 796344192. Its totient is φ = 170645160.

The previous prime is 398172053. The next prime is 398172083. The reversal of 398172068 is 860271893.

It is an interprime number because it is at equal distance from previous prime (398172053) and next prime (398172083).

398172068 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7110188 + ... + 7110243.

It is an arithmetic number, because the mean of its divisors is an integer number (66362016).

Almost surely, 2^398172068 is an apocalyptic number.

It is an amenable number.

398172068 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398172068 is a wasteful number, since it uses less digits than its factorization.

398172068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220442 (or 14220440 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 398172068 is about 19954.2493720009. The cubic root of 398172068 is about 735.6822258655.

The spelling of 398172068 in words is "three hundred ninety-eight million, one hundred seventy-two thousand, sixty-eight".