398734 has 16 divisors (see below), whose sum is σ = 720000. Its totient is φ = 161784.

The previous prime is 398731. The next prime is 398759. The reversal of 398734 is 437893.

It is a self number, because there is not a number n which added to its sum of digits gives 398734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398731) 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, 484 + ... + 1015.

It is an arithmetic number, because the mean of its divisors is an integer number (45000).

2³⁹⁸⁷³⁴ is an apocalyptic number.

398734 is a deficient number, since it is larger than the sum of its proper divisors (321266).

398734 is a wasteful number, since it uses less digits than its factorization.

398734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527.

The product of its digits is 18144, while the sum is 34.

The square root of 398734 is about 631.4538779673. The cubic root of 398734 is about 73.6028147553.

The spelling of 398734 in words is "three hundred ninety-eight thousand, seven hundred thirty-four".