981043668 has 72 divisors (see below), whose sum is σ = 2798621280. Its totient is φ = 287031360.

The previous prime is 981043627. The next prime is 981043669. The reversal of 981043668 is 866340189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981043669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31230 + ... + 54197.

It is an arithmetic number, because the mean of its divisors is an integer number (38869740).

Almost surely, 2^981043668 is an apocalyptic number.

It is an amenable number.

981043668 is an abundant number, since it is smaller than the sum of its proper divisors (1817577612).

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

981043668 is a wasteful number, since it uses less digits than its factorization.

981043668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85477 (or 85472 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 981043668 is about 31321.6166249445. The cubic root of 981043668 is about 993.6408698484.

The spelling of 981043668 in words is "nine hundred eighty-one million, forty-three thousand, six hundred sixty-eight".