398836 has 6 divisors (see below), whose sum is σ = 697970. Its totient is φ = 199416.

The previous prime is 398833. The next prime is 398857. The reversal of 398836 is 638893.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 1936 = 630^2 + 44^2 .

It is a junction number, because it is equal to n+sod(n) for n = 398795 and 398804.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 49851 + ... + 49858.

2³⁹⁸⁸³⁶ is an apocalyptic number.

It is an amenable number.

398836 is a deficient number, since it is larger than the sum of its proper divisors (299134).

398836 is a wasteful number, since it uses less digits than its factorization.

398836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99713 (or 99711 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 398836 is about 631.5346387966. The cubic root of 398836 is about 73.6090903233.

The spelling of 398836 in words is "three hundred ninety-eight thousand, eight hundred thirty-six".