39981384976 has 80 divisors (see below), whose sum is σ = 86238035968. Its totient is φ = 17831923200.

The previous prime is 39981384953. The next prime is 39981384977. The reversal of 39981384976 is 67948318993.

It is a super-2 number, since 2×39981384976² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39981384977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4877041 + ... + 4885231.

Almost surely, 2^39981384976 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 39981384976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43119017984).

39981384976 is an abundant number, since it is smaller than the sum of its proper divisors (46256650992).

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

39981384976 is a wasteful number, since it uses less digits than its factorization.

39981384976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000 (or 8994 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 67.

The spelling of 39981384976 in words is "thirty-nine billion, nine hundred eighty-one million, three hundred eighty-four thousand, nine hundred seventy-six".