398408 has 8 divisors (see below), whose sum is σ = 747030. Its totient is φ = 199200.

The previous prime is 398407. The next prime is 398417. The reversal of 398408 is 804893.

It can be written as a sum of positive squares in only one way, i.e., 357604 + 40804 = 598^2 + 202^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (398407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24893 + ... + 24908.

2³⁹⁸⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

398408 is a deficient number, since it is larger than the sum of its proper divisors (348622).

398408 is a wasteful number, since it uses less digits than its factorization.

398408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49807 (or 49803 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 398408 is about 631.1956907331. The cubic root of 398408 is about 73.5827503684.

The spelling of 398408 in words is "three hundred ninety-eight thousand, four hundred eight".