998643930 has 16 divisors (see below), whose sum is σ = 2396745504. Its totient is φ = 266305040.

The previous prime is 998643917. The next prime is 998643931. The reversal of 998643930 is 39346899.

998643930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (998643931) 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, 16644036 + ... + 16644095.

It is an arithmetic number, because the mean of its divisors is an integer number (149796594).

Almost surely, 2^998643930 is an apocalyptic number.

998643930 is an abundant number, since it is smaller than the sum of its proper divisors (1398101574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

998643930 is a wasteful number, since it uses less digits than its factorization.

998643930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33288141.

The product of its (nonzero) digits is 1259712, while the sum is 51.

The square root of 998643930 is about 31601.3279784252. The cubic root of 998643930 is about 999.5477721875.

The spelling of 998643930 in words is "nine hundred ninety-eight million, six hundred forty-three thousand, nine hundred thirty".