398966 has 4 divisors (see below), whose sum is σ = 598452. Its totient is φ = 199482.

The previous prime is 398941. The next prime is 398969. The reversal of 398966 is 669893.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99740 + ... + 99743.

It is an arithmetic number, because the mean of its divisors is an integer number (149613).

2³⁹⁸⁹⁶⁶ is an apocalyptic number.

398966 is a deficient number, since it is larger than the sum of its proper divisors (199486).

398966 is a wasteful number, since it uses less digits than its factorization.

398966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199485.

The product of its digits is 69984, while the sum is 41.

The square root of 398966 is about 631.6375542983. The cubic root of 398966 is about 73.6170870457.

The spelling of 398966 in words is "three hundred ninety-eight thousand, nine hundred sixty-six".