998147520 has 672 divisors, whose sum is σ = 4065422400. Its totient is φ = 222953472.

The previous prime is 998147461. The next prime is 998147543. The reversal of 998147520 is 25741899.

998147520 is a `hidden beast` number, since 9 + 9 + 81 + 47 + 520 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26976942 + ... + 26976978.

Almost surely, 2^998147520 is an apocalyptic number.

998147520 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 998147520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032711200).

998147520 is an abundant number, since it is smaller than the sum of its proper divisors (3067274880).

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

998147520 is a wasteful number, since it uses less digits than its factorization.

998147520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 998147520 is about 31593.4727435906. The cubic root of 998147520 is about 999.3821249757.

The spelling of 998147520 in words is "nine hundred ninety-eight million, one hundred forty-seven thousand, five hundred twenty".