398985544 has 8 divisors (see below), whose sum is σ = 748097910. Its totient is φ = 199492768.

The previous prime is 398985539. The next prime is 398985547. The reversal of 398985544 is 445589893.

It can be written as a sum of positive squares in only one way, i.e., 398481444 + 504100 = 19962^2 + 710^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (398985547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24936589 + ... + 24936604.

Almost surely, 2^398985544 is an apocalyptic number.

It is an amenable number.

398985544 is a deficient number, since it is larger than the sum of its proper divisors (349112366).

398985544 is a wasteful number, since it uses less digits than its factorization.

398985544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49873199 (or 49873195 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 55.

The square root of 398985544 is about 19974.6224995618. The cubic root of 398985544 is about 736.1828911038.

The spelling of 398985544 in words is "three hundred ninety-eight million, nine hundred eighty-five thousand, five hundred forty-four".