398574 has 48 divisors (see below), whose sum is σ = 989520. Its totient is φ = 118800.

The previous prime is 398569. The next prime is 398581. The reversal of 398574 is 475893.

398574 = T₁₁₂ + T₁₁₃ + ... + T₁₅₅.

It is a super-2 number, since 2×398574² = 317722466952, which contains 22 as substring.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

398574 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 in 23 ways as a sum of consecutive naturals, for example, 6504 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (20615).

398574 is a Friedman number, since it can be written as (5+9^7/3)/4-8, using all its digits and the basic arithmetic operations.

2³⁹⁸⁵⁷⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398574, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494760).

398574 is an abundant number, since it is smaller than the sum of its proper divisors (590946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398574 is a wasteful number, since it uses less digits than its factorization.

398574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 77 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 398574 is about 631.3271735004. The cubic root of 398574 is about 73.5929685705.

The spelling of 398574 in words is "three hundred ninety-eight thousand, five hundred seventy-four".