398674 has 4 divisors (see below), whose sum is σ = 598014. Its totient is φ = 199336.

The previous prime is 398669. The next prime is 398681. The reversal of 398674 is 476893.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 476893 = 37 ⋅12889.

It can be written as a sum of positive squares in only one way, i.e., 378225 + 20449 = 615^2 + 143^2 .

It is an unprimeable number.

398674 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99667 + ... + 99670.

2³⁹⁸⁶⁷⁴ is an apocalyptic number.

398674 is a deficient number, since it is larger than the sum of its proper divisors (199340).

398674 is a wasteful number, since it uses less digits than its factorization.

398674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199339.

The product of its digits is 36288, while the sum is 37.

The square root of 398674 is about 631.4063667718. The cubic root of 398674 is about 73.5991227447.

The spelling of 398674 in words is "three hundred ninety-eight thousand, six hundred seventy-four".