398178 has 24 divisors (see below), whose sum is σ = 941616. Its totient is φ = 120600.

The previous prime is 398171. The next prime is 398207. The reversal of 398178 is 871893.

It is not an unprimeable number, because it can be changed into a prime (398171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 808 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (39234).

2³⁹⁸¹⁷⁸ is an apocalyptic number.

398178 is an abundant number, since it is smaller than the sum of its proper divisors (543438).

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

398178 is a wasteful number, since it uses less digits than its factorization.

398178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2027 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 398178 is about 631.0134705377. The cubic root of 398178 is about 73.5685879265.

It can be divided in two parts, 398 and 178, that added together give a square (576 = 24²).

The spelling of 398178 in words is "three hundred ninety-eight thousand, one hundred seventy-eight".