39981259880 has 32 divisors (see below), whose sum is σ = 92151932040. Its totient is φ = 15602442240.

The previous prime is 39981259861. The next prime is 39981259883. The reversal of 39981259880 is 8895218993.

It can be written as a sum of positive squares in 4 ways, for example, as 12413970724 + 27567289156 = 111418^2 + 166034^2 .

It is a super-2 number, since 2×39981259880² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (39981259883) 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, 12187769 + ... + 12191048.

Almost surely, 2^39981259880 is an apocalyptic number.

It is an amenable number.

39981259880 is an abundant number, since it is smaller than the sum of its proper divisors (52170672160).

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

39981259880 is a wasteful number, since it uses less digits than its factorization.

39981259880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24378869 (or 24378865 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 62.

The spelling of 39981259880 in words is "thirty-nine billion, nine hundred eighty-one million, two hundred fifty-nine thousand, eight hundred eighty".