398529 has 6 divisors (see below), whose sum is σ = 575666. Its totient is φ = 265680.

The previous prime is 398509. The next prime is 398539. The reversal of 398529 is 925893.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 106929 = 540^2 + 327^2 .

It is not a de Polignac number, because 398529 - 2⁸ = 398273 is a prime.

It is a Duffinian number.

398529 is a lucky number.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 398493 and 398502.

It is not an unprimeable number, because it can be changed into a prime (398509) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 22132 + ... + 22149.

2³⁹⁸⁵²⁹ is an apocalyptic number.

It is an amenable number.

398529 is a deficient number, since it is larger than the sum of its proper divisors (177137).

398529 is a wasteful number, since it uses less digits than its factorization.

398529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44287 (or 44284 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 398529 is about 631.2915332871. The cubic root of 398529 is about 73.5901988563.

The spelling of 398529 in words is "three hundred ninety-eight thousand, five hundred twenty-nine".