398530 has 16 divisors (see below), whose sum is σ = 782784. Its totient is φ = 144880.

The previous prime is 398509. The next prime is 398539. The reversal of 398530 is 35893.

It is a happy number.

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

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

398530 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 7 ways as a sum of consecutive naturals, for example, 1702 + ... + 1921.

It is an arithmetic number, because the mean of its divisors is an integer number (48924).

2³⁹⁸⁵³⁰ is an apocalyptic number.

398530 is a deficient number, since it is larger than the sum of its proper divisors (384254).

398530 is a wasteful number, since it uses less digits than its factorization.

398530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3641.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 398530 is about 631.2923253137. The cubic root of 398530 is about 73.5902604078.

The spelling of 398530 in words is "three hundred ninety-eight thousand, five hundred thirty".