398485 has 4 divisors (see below), whose sum is σ = 478188. Its totient is φ = 318784.

The previous prime is 398477. The next prime is 398491. The reversal of 398485 is 584893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584893 = 197 ⋅2969.

It can be written as a sum of positive squares in 2 ways, for example, as 154449 + 244036 = 393^2 + 494^2 .

It is a cyclic number.

It is not a de Polignac number, because 398485 - 2³ = 398477 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39844 + ... + 39853.

It is an arithmetic number, because the mean of its divisors is an integer number (119547).

2³⁹⁸⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

398485 is a deficient number, since it is larger than the sum of its proper divisors (79703).

398485 is an equidigital number, since it uses as much as digits as its factorization.

398485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79702.

The product of its digits is 34560, while the sum is 37.

The square root of 398485 is about 631.2566831329. The cubic root of 398485 is about 73.5874904897.

The spelling of 398485 in words is "three hundred ninety-eight thousand, four hundred eighty-five".