981705220 has 48 divisors (see below), whose sum is σ = 2104967088. Its totient is φ = 384450560.

The previous prime is 981705211. The next prime is 981705227. The reversal of 981705220 is 22507189.

It can be written as a sum of positive squares in 8 ways, for example, as 154107396 + 827597824 = 12414^2 + 28768^2 .

It is not an unprimeable number, because it can be changed into a prime (981705227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 806052 + ... + 807268.

It is an arithmetic number, because the mean of its divisors is an integer number (43853481).

Almost surely, 2^981705220 is an apocalyptic number.

It is an amenable number.

981705220 is an abundant number, since it is smaller than the sum of its proper divisors (1123261868).

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

981705220 is a wasteful number, since it uses less digits than its factorization.

981705220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040 (or 2038 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 981705220 is about 31332.1754750608. The cubic root of 981705220 is about 993.8641685742.

The spelling of 981705220 in words is "nine hundred eighty-one million, seven hundred five thousand, two hundred twenty".