398536 has 16 divisors (see below), whose sum is σ = 771840. Its totient is φ = 192720.

The previous prime is 398509. The next prime is 398539. The reversal of 398536 is 635893.

It is not an unprimeable number, because it can be changed into a prime (398539) by changing a digit.

398536 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556 + ... + 1051.

It is an arithmetic number, because the mean of its divisors is an integer number (48240).

2³⁹⁸⁵³⁶ is an apocalyptic number.

It is an amenable number.

398536 is a deficient number, since it is larger than the sum of its proper divisors (373304).

398536 is a wasteful number, since it uses less digits than its factorization.

398536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1640 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 398536 is about 631.2970774524. The cubic root of 398536 is about 73.5906297145.

The spelling of 398536 in words is "three hundred ninety-eight thousand, five hundred thirty-six".