39991310928 has 120 divisors (see below), whose sum is σ = 119809720576. Its totient is φ = 12900384000.

The previous prime is 39991310893. The next prime is 39991310951. The reversal of 39991310928 is 82901319993.

It is a Harshad number since it is a multiple of its sum of digits (54).

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 23 ways as a sum of consecutive naturals, for example, 45373 + ... + 286428.

Almost surely, 2^39991310928 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 39991310928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59904860288).

39991310928 is an abundant number, since it is smaller than the sum of its proper divisors (79818409648).

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

39991310928 is a wasteful number, since it uses less digits than its factorization.

39991310928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331855 (or 331837 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 54.

The spelling of 39991310928 in words is "thirty-nine billion, nine hundred ninety-one million, three hundred ten thousand, nine hundred twenty-eight".