398726 has 8 divisors (see below), whose sum is σ = 606504. Its totient is φ = 196560.

The previous prime is 398711. The next prime is 398729. The reversal of 398726 is 627893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220 + ... + 1511.

It is an arithmetic number, because the mean of its divisors is an integer number (75813).

2³⁹⁸⁷²⁶ is an apocalyptic number.

398726 is a deficient number, since it is larger than the sum of its proper divisors (207778).

398726 is a wasteful number, since it uses less digits than its factorization.

398726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2806.

The product of its digits is 18144, while the sum is 35.

The square root of 398726 is about 631.4475433478. The cubic root of 398726 is about 73.6023225086.

The spelling of 398726 in words is "three hundred ninety-eight thousand, seven hundred twenty-six".