398426 has 16 divisors (see below), whose sum is σ = 691200. Its totient is φ = 168720.

The previous prime is 398423. The next prime is 398441. The reversal of 398426 is 624893.

It is a d-powerful number, because it can be written as 3¹⁰ + 9⁵ + 4⁴ + 8 + 2⁷ + 6⁷ .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 398392 and 398401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1991 + ... + 2181.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2³⁹⁸⁴²⁶ is an apocalyptic number.

398426 is a deficient number, since it is larger than the sum of its proper divisors (292774).

398426 is a wasteful number, since it uses less digits than its factorization.

398426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its digits is 10368, while the sum is 32.

The square root of 398426 is about 631.2099492245. The cubic root of 398426 is about 73.5838585034.

The spelling of 398426 in words is "three hundred ninety-eight thousand, four hundred twenty-six".