398822 has 4 divisors (see below), whose sum is σ = 598236. Its totient is φ = 199410.

The previous prime is 398821. The next prime is 398833. The reversal of 398822 is 228893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99704 + ... + 99707.

It is an arithmetic number, because the mean of its divisors is an integer number (149559).

2³⁹⁸⁸²² is an apocalyptic number.

398822 is a deficient number, since it is larger than the sum of its proper divisors (199414).

398822 is a wasteful number, since it uses less digits than its factorization.

398822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199413.

The product of its digits is 6912, while the sum is 32.

The square root of 398822 is about 631.5235545884. The cubic root of 398822 is about 73.6082290342.

The spelling of 398822 in words is "three hundred ninety-eight thousand, eight hundred twenty-two".