998404641 has 24 divisors (see below), whose sum is σ = 1554309120. Its totient is φ = 613914336.

The previous prime is 998404591. The next prime is 998404643. The reversal of 998404641 is 146404899.

It is not a de Polignac number, because 998404641 - 2¹¹ = 998402593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998404643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 192480 + ... + 197598.

It is an arithmetic number, because the mean of its divisors is an integer number (64762880).

Almost surely, 2^998404641 is an apocalyptic number.

It is an amenable number.

998404641 is a deficient number, since it is larger than the sum of its proper divisors (555904479).

998404641 is a wasteful number, since it uses less digits than its factorization.

998404641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6805 (or 6802 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 998404641 is about 31597.5416923532. The cubic root of 998404641 is about 999.4679306190.

The spelling of 998404641 in words is "nine hundred ninety-eight million, four hundred four thousand, six hundred forty-one".