398961166 has 8 divisors (see below), whose sum is σ = 598834224. Its totient is φ = 199349760.

The previous prime is 398961131. The next prime is 398961169. The reversal of 398961166 is 661169893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398961169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61555 + ... + 67726.

It is an arithmetic number, because the mean of its divisors is an integer number (74854278).

Almost surely, 2^398961166 is an apocalyptic number.

398961166 is a deficient number, since it is larger than the sum of its proper divisors (199873058).

398961166 is a wasteful number, since it uses less digits than its factorization.

398961166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130826.

The product of its digits is 419904, while the sum is 49.

The square root of 398961166 is about 19974.0122659420. The cubic root of 398961166 is about 736.1678972172.

The spelling of 398961166 in words is "three hundred ninety-eight million, nine hundred sixty-one thousand, one hundred sixty-six".