398884 has 6 divisors (see below), whose sum is σ = 698054. Its totient is φ = 199440.

The previous prime is 398863. The next prime is 398887. The reversal of 398884 is 488893.

It can be written as a sum of positive squares in only one way, i.e., 324900 + 73984 = 570^2 + 272^2 .

It is not an unprimeable number, because it can be changed into a prime (398887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49857 + ... + 49864.

2³⁹⁸⁸⁸⁴ is an apocalyptic number.

It is an amenable number.

398884 is a deficient number, since it is larger than the sum of its proper divisors (299170).

398884 is a wasteful number, since it uses less digits than its factorization.

398884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99725 (or 99723 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 398884 is about 631.5726403194. The cubic root of 398884 is about 73.6120431616.

Subtracting 398884 from its reverse (488893), we obtain a palindrome (90009).

The spelling of 398884 in words is "three hundred ninety-eight thousand, eight hundred eighty-four".