9781980336 has 80 divisors (see below), whose sum is σ = 29729570400. Its totient is φ = 3068854272.

The previous prime is 9781980289. The next prime is 9781980359. The reversal of 9781980336 is 6330891879.

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

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, 658641 + ... + 673328.

It is an arithmetic number, because the mean of its divisors is an integer number (371619630).

Almost surely, 2^9781980336 is an apocalyptic number.

It is an amenable number.

9781980336 is an abundant number, since it is smaller than the sum of its proper divisors (19947590064).

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

9781980336 is a wasteful number, since it uses less digits than its factorization.

9781980336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332003 (or 1331991 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 9781980336 is about 98903.8944430400. The cubic root of 9781980336 is about 2138.6625363378.

The spelling of 9781980336 in words is "nine billion, seven hundred eighty-one million, nine hundred eighty thousand, three hundred thirty-six".