398440160 has 24 divisors (see below), whose sum is σ = 941315256. Its totient is φ = 159376000.

The previous prime is 398440151. The next prime is 398440181. The reversal of 398440160 is 61044893.

It is a super-2 number, since 2×398440160² = 317509122201651200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 398440160.

It is a congruent 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, 1244966 + ... + 1245285.

It is an arithmetic number, because the mean of its divisors is an integer number (39221469).

Almost surely, 2^398440160 is an apocalyptic number.

It is an amenable number.

398440160 is an abundant number, since it is smaller than the sum of its proper divisors (542875096).

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

398440160 is a wasteful number, since it uses less digits than its factorization.

398440160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490266 (or 2490258 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 398440160 is about 19960.9659084925. The cubic root of 398440160 is about 735.8473021279.

It can be divided in two parts, 3984 and 40160, that added together give a palindrome (44144).

The spelling of 398440160 in words is "three hundred ninety-eight million, four hundred forty thousand, one hundred sixty".