398544566 has 16 divisors (see below), whose sum is σ = 723409056. Its totient is φ = 160757376.

The previous prime is 398544557. The next prime is 398544569. The reversal of 398544566 is 665445893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398544569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837041 + ... + 837516.

It is an arithmetic number, because the mean of its divisors is an integer number (45213066).

Almost surely, 2^398544566 is an apocalyptic number.

398544566 is a deficient number, since it is larger than the sum of its proper divisors (324864490).

398544566 is a wasteful number, since it uses less digits than its factorization.

398544566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674583.

The product of its digits is 3110400, while the sum is 50.

The square root of 398544566 is about 19963.5809913953. The cubic root of 398544566 is about 735.9115695484.

The spelling of 398544566 in words is "three hundred ninety-eight million, five hundred forty-four thousand, five hundred sixty-six".