39381387056 has 80 divisors (see below), whose sum is σ = 86184483840. Its totient is φ = 17268061440.

The previous prime is 39381387053. The next prime is 39381387079. The reversal of 39381387056 is 65078318393.

It is a junction number, because it is equal to n+sod(n) for n = 39381386989 and 39381387007.

It is not an unprimeable number, because it can be changed into a prime (39381387053) 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, 7280705 + ... + 7286111.

It is an arithmetic number, because the mean of its divisors is an integer number (1077306048).

Almost surely, 2^39381387056 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 39381387056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43092241920).

39381387056 is an abundant number, since it is smaller than the sum of its proper divisors (46803096784).

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

39381387056 is a wasteful number, since it uses less digits than its factorization.

39381387056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6882 (or 6876 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 39381387056 in words is "thirty-nine billion, three hundred eighty-one million, three hundred eighty-seven thousand, fifty-six".