398766 has 16 divisors (see below), whose sum is σ = 817488. Its totient is φ = 129600.

The previous prime is 398759. The next prime is 398771. The reversal of 398766 is 667893.

It is a congruent number.

It is an unprimeable number.

398766 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 7 ways as a sum of consecutive naturals, for example, 565 + ... + 1056.

It is an arithmetic number, because the mean of its divisors is an integer number (51093).

2³⁹⁸⁷⁶⁶ is an apocalyptic number.

398766 is an abundant number, since it is smaller than the sum of its proper divisors (418722).

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

398766 is a wasteful number, since it uses less digits than its factorization.

398766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667.

The product of its digits is 54432, while the sum is 39.

The square root of 398766 is about 631.4792158100. The cubic root of 398766 is about 73.6047836762.

The spelling of 398766 in words is "three hundred ninety-eight thousand, seven hundred sixty-six".