398898 has 32 divisors (see below), whose sum is σ = 907200. Its totient is φ = 129888.

The previous prime is 398887. The next prime is 398903. The reversal of 398898 is 898893.

It is a super-2 number, since 2×398898² = 318239228808, which contains 22 as substring.

It is an unprimeable number.

398898 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 15 ways as a sum of consecutive naturals, for example, 4438 + ... + 4526.

It is an arithmetic number, because the mean of its divisors is an integer number (28350).

2³⁹⁸⁸⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453600).

398898 is an abundant number, since it is smaller than the sum of its proper divisors (508302).

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

398898 is a wasteful number, since it uses less digits than its factorization.

398898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 177 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 398898 is about 631.5837236662. The cubic root of 398898 is about 73.6129043615.

It can be divided in two parts, 398 and 898, that added together give a 4-th power (1296 = 6⁴).

The spelling of 398898 in words is "three hundred ninety-eight thousand, eight hundred ninety-eight".