998560780 has 24 divisors (see below), whose sum is σ = 2396546208. Its totient is φ = 342363648.

The previous prime is 998560753. The next prime is 998560811. The reversal of 998560780 is 87065899.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3566149 + ... + 3566428.

It is an arithmetic number, because the mean of its divisors is an integer number (99856092).

Almost surely, 2^998560780 is an apocalyptic number.

It is an amenable number.

998560780 is an abundant number, since it is smaller than the sum of its proper divisors (1397985428).

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

998560780 is a wasteful number, since it uses less digits than its factorization.

998560780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7132593 (or 7132591 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 998560780 is about 31600.0123417697. The cubic root of 998560780 is about 999.5200296653.

The spelling of 998560780 in words is "nine hundred ninety-eight million, five hundred sixty thousand, seven hundred eighty".