998510064 has 80 divisors (see below), whose sum is σ = 2652476064. Its totient is φ = 323481600.

The previous prime is 998510057. The next prime is 998510077. The reversal of 998510064 is 460015899.

It is a junction number, because it is equal to n+sod(n) for n = 998509998 and 998510025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 615174 + ... + 616794.

Almost surely, 2^998510064 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 998510064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1326238032).

998510064 is an abundant number, since it is smaller than the sum of its proper divisors (1653966000).

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

998510064 is a wasteful number, since it uses less digits than its factorization.

998510064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 998510064 is about 31599.2098635393. The cubic root of 998510064 is about 999.5031078057.

The spelling of 998510064 in words is "nine hundred ninety-eight million, five hundred ten thousand, sixty-four".