39861975384 has 192 divisors, whose sum is σ = 134819043840. Its totient is φ = 10336826880.

The previous prime is 39861975371. The next prime is 39861975389. The reversal of 39861975384 is 48357916893.

39861975384 is a `hidden beast` number, since 3 + 9 + 8 + 6 + 1 + 97 + 538 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39861975389) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3581412 + ... + 3592524.

It is an arithmetic number, because the mean of its divisors is an integer number (702182520).

Almost surely, 2^39861975384 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 39861975384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67409521920).

39861975384 is an abundant number, since it is smaller than the sum of its proper divisors (94957068456).

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

39861975384 is a wasteful number, since it uses less digits than its factorization.

39861975384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11790 (or 11783 counting only the distinct ones).

The product of its digits is 39191040, while the sum is 63.

The spelling of 39861975384 in words is "thirty-nine billion, eight hundred sixty-one million, nine hundred seventy-five thousand, three hundred eighty-four".