398162 has 4 divisors (see below), whose sum is σ = 597246. Its totient is φ = 199080.

The previous prime is 398149. The next prime is 398171. The reversal of 398162 is 261893.

It is a Cunningham number, because it is equal to 631²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 261893 = 101 ⋅2593.

It can be written as a sum of positive squares in only one way, i.e., 398161 + 1 = 631^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99539 + ... + 99542.

398162 is a Friedman number, since it can be written as 631^2+9-8, using all its digits and the basic arithmetic operations.

2³⁹⁸¹⁶² is an apocalyptic number.

398162 is a deficient number, since it is larger than the sum of its proper divisors (199084).

398162 is a wasteful number, since it uses less digits than its factorization.

398162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199083.

The product of its digits is 2592, while the sum is 29.

The square root of 398162 is about 631.0007923925. Note that the first 3 decimals coincide. The cubic root of 398162 is about 73.5676025103.

The spelling of 398162 in words is "three hundred ninety-eight thousand, one hundred sixty-two".