981663732 has 96 divisors (see below), whose sum is σ = 3002531840. Its totient is φ = 271421280.

The previous prime is 981663719. The next prime is 981663757. The reversal of 981663732 is 237366189.

981663732 is a `hidden beast` number, since 9 + 8 + 1 + 6 + 637 + 3 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2493 + ... + 44379.

Almost surely, 2^981663732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 981663732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501265920).

981663732 is an abundant number, since it is smaller than the sum of its proper divisors (2020868108).

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

981663732 is a wasteful number, since it uses less digits than its factorization.

981663732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41938 (or 41930 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 981663732 is about 31331.5134010472. The cubic root of 981663732 is about 993.8501677599.

The spelling of 981663732 in words is "nine hundred eighty-one million, six hundred sixty-three thousand, seven hundred thirty-two".