998555530 has 32 divisors (see below), whose sum is σ = 2088996480. Its totient is φ = 336557760.

The previous prime is 998555513. The next prime is 998555531. The reversal of 998555530 is 35555899.

It is a super-2 number, since 2×998555530² = 1994226292987161800, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (998555531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116761 + ... + 125020.

It is an arithmetic number, because the mean of its divisors is an integer number (65281140).

Almost surely, 2^998555530 is an apocalyptic number.

998555530 is an abundant number, since it is smaller than the sum of its proper divisors (1090440950).

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

998555530 is a wasteful number, since it uses less digits than its factorization.

998555530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241854.

The product of its (nonzero) digits is 1215000, while the sum is 49.

The square root of 998555530 is about 31599.9292720727. The cubic root of 998555530 is about 999.5182779812.

The spelling of 998555530 in words is "nine hundred ninety-eight million, five hundred fifty-five thousand, five hundred thirty".