398180568 has 64 divisors (see below), whose sum is σ = 1050105600. Its totient is φ = 125470080.

The previous prime is 398180551. The next prime is 398180609. The reversal of 398180568 is 865081893.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374758 + ... + 375818.

It is an arithmetic number, because the mean of its divisors is an integer number (16407900).

Almost surely, 2^398180568 is an apocalyptic number.

398180568 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398180568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (525052800).

398180568 is an abundant number, since it is smaller than the sum of its proper divisors (651925032).

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

398180568 is a wasteful number, since it uses less digits than its factorization.

398180568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912 (or 1908 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 398180568 is about 19954.4623580792. The cubic root of 398180568 is about 735.6874608338.

The spelling of 398180568 in words is "three hundred ninety-eight million, one hundred eighty thousand, five hundred sixty-eight".