998428356 has 60 divisors (see below), whose sum is σ = 2700117420. Its totient is φ = 321330240.

The previous prime is 998428349. The next prime is 998428357. The reversal of 998428356 is 653824899.

998428356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 156500100 + 841928256 = 12510^2 + 29016^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (998428357) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43735 + ... + 62526.

It is an arithmetic number, because the mean of its divisors is an integer number (45001957).

Almost surely, 2^998428356 is an apocalyptic number.

It is an amenable number.

998428356 is an abundant number, since it is smaller than the sum of its proper divisors (1701689064).

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

998428356 is a wasteful number, since it uses less digits than its factorization.

998428356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106306 (or 106295 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 998428356 is about 31597.9169566603. The cubic root of 998428356 is about 999.4758439751.

The spelling of 998428356 in words is "nine hundred ninety-eight million, four hundred twenty-eight thousand, three hundred fifty-six".