998603520 has 144 divisors (see below), whose sum is σ = 3357392640. Its totient is φ = 252260352.

The previous prime is 998603509. The next prime is 998603521. The reversal of 998603520 is 25306899.

It is not an unprimeable number, because it can be changed into a prime (998603521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66117 + ... + 79803.

Almost surely, 2^998603520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998603520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678696320).

998603520 is an abundant number, since it is smaller than the sum of its proper divisors (2358789120).

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

998603520 is a wasteful number, since it uses less digits than its factorization.

998603520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13730 (or 13716 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 998603520 is about 31600.6886000922. The cubic root of 998603520 is about 999.5342898144.

The spelling of 998603520 in words is "nine hundred ninety-eight million, six hundred three thousand, five hundred twenty".