998585280 has 896 divisors, whose sum is σ = 4681728000. Its totient is φ = 194088960.

The previous prime is 998585249. The next prime is 998585293. The reversal of 998585280 is 82585899.

It is a super-2 number, since 2×998585280² = 1994345122865356800, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12640281 + ... + 12640359.

Almost surely, 2^998585280 is an apocalyptic number.

998585280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998585280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2340864000).

998585280 is an abundant number, since it is smaller than the sum of its proper divisors (3683142720).

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

998585280 is a wasteful number, since it uses less digits than its factorization.

998585280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The square root of 998585280 is about 31600.3999974684. The cubic root of 998585280 is about 999.5282041103.

The spelling of 998585280 in words is "nine hundred ninety-eight million, five hundred eighty-five thousand, two hundred eighty".