398502 has 36 divisors (see below), whose sum is σ = 942084. Its totient is φ = 121680.

The previous prime is 398491. The next prime is 398509. The reversal of 398502 is 205893.

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398502.

It is not an unprimeable number, because it can be changed into a prime (398509) by changing a digit.

398502 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 17 ways as a sum of consecutive naturals, for example, 2977 + ... + 3107.

It is an arithmetic number, because the mean of its divisors is an integer number (26169).

2³⁹⁸⁵⁰² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (471042).

398502 is an abundant number, since it is smaller than the sum of its proper divisors (543582).

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

398502 is a wasteful number, since it uses less digits than its factorization.

398502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 398502 is about 631.2701481933. The cubic root of 398502 is about 73.5885369277.

It can be divided in two parts, 398 and 502, that added together give a square (900 = 30²).

The spelling of 398502 in words is "three hundred ninety-eight thousand, five hundred two".