981563444 has 24 divisors (see below), whose sum is σ = 1750466088. Its totient is φ = 481472640.

The previous prime is 981563437. The next prime is 981563461. The reversal of 981563444 is 444365189.

It can be written as a sum of positive squares in 4 ways, for example, as 108951844 + 872611600 = 10438^2 + 29540^2 .

It is a super-2 number, since 2×981563444² = 1926933589194282272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 981563395 and 981563404.

It is a congruent number.

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, 91802 + ... + 101934.

It is an arithmetic number, because the mean of its divisors is an integer number (72936087).

Almost surely, 2^981563444 is an apocalyptic number.

It is an amenable number.

981563444 is a deficient number, since it is larger than the sum of its proper divisors (768902644).

981563444 is a wasteful number, since it uses less digits than its factorization.

981563444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10595 (or 10593 counting only the distinct ones).

The product of its digits is 414720, while the sum is 44.

The square root of 981563444 is about 31329.9129267861. The cubic root of 981563444 is about 993.8163222801.

The spelling of 981563444 in words is "nine hundred eighty-one million, five hundred sixty-three thousand, four hundred forty-four".