398837 has 8 divisors (see below), whose sum is σ = 437400. Its totient is φ = 361984.

The previous prime is 398833. The next prime is 398857. The reversal of 398837 is 738893.

It can be written as a sum of positive squares in 4 ways, for example, as 192721 + 206116 = 439^2 + 454^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 398837 - 2² = 398833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 398837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89 + ... + 897.

It is an arithmetic number, because the mean of its divisors is an integer number (54675).

2³⁹⁸⁸³⁷ is an apocalyptic number.

It is an amenable number.

398837 is a deficient number, since it is larger than the sum of its proper divisors (38563).

398837 is a wasteful number, since it uses less digits than its factorization.

398837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 855.

The product of its digits is 36288, while the sum is 38.

The square root of 398837 is about 631.5354305184. The cubic root of 398837 is about 73.6091518432.

The spelling of 398837 in words is "three hundred ninety-eight thousand, eight hundred thirty-seven".