981944500 has 24 divisors (see below), whose sum is σ = 2144567880. Its totient is φ = 392777600.

The previous prime is 981944479. The next prime is 981944501. The reversal of 981944500 is 5449189.

It can be written as a sum of positive squares in 4 ways, for example, as 174134416 + 807810084 = 13196^2 + 28422^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981944501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981445 + ... + 982444.

It is an arithmetic number, because the mean of its divisors is an integer number (89356995).

Almost surely, 2^981944500 is an apocalyptic number.

It is an amenable number.

981944500 is an abundant number, since it is smaller than the sum of its proper divisors (1162623380).

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

981944500 is a wasteful number, since it uses less digits than its factorization.

981944500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1963908 (or 1963896 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 981944500 is about 31335.9936813882. The cubic root of 981944500 is about 993.9449098852.

The spelling of 981944500 in words is "nine hundred eighty-one million, nine hundred forty-four thousand, five hundred".