981448881 has 16 divisors (see below), whose sum is σ = 1526064000. Its totient is φ = 560827344.

The previous prime is 981448873. The next prime is 981448883. The reversal of 981448881 is 188844189.

It is not a de Polignac number, because 981448881 - 2³ = 981448873 is a prime.

It is a super-2 number, since 2×981448881² = 1926483812032304322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (981448883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475866 + ... + 477923.

It is an arithmetic number, because the mean of its divisors is an integer number (95379000).

Almost surely, 2^981448881 is an apocalyptic number.

It is an amenable number.

981448881 is a deficient number, since it is larger than the sum of its proper divisors (544615119).

981448881 is an equidigital number, since it uses as much as digits as its factorization.

981448881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953813 (or 953799 counting only the distinct ones).

The product of its digits is 589824, while the sum is 51.

The square root of 981448881 is about 31328.0845408716. The cubic root of 981448881 is about 993.7776564116. Note that the first 3 decimals are identical.

The spelling of 981448881 in words is "nine hundred eighty-one million, four hundred forty-eight thousand, eight hundred eighty-one".