39847489920 has 1024 divisors, whose sum is σ = 168618240000. Its totient is φ = 8998262784.

The previous prime is 39847489907. The next prime is 39847489951. The reversal of 39847489920 is 2998474893.

39847489920 is a `hidden beast` number, since 3 + 98 + 47 + 489 + 9 + 20 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 480090199 + ... + 480090281.

It is an arithmetic number, because the mean of its divisors is an integer number (164666250).

Almost surely, 2^39847489920 is an apocalyptic number.

39847489920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39847489920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84309120000).

39847489920 is an abundant number, since it is smaller than the sum of its proper divisors (128770750080).

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

39847489920 is an frugal number, since it uses more digits than its factorization.

39847489920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 39847489920 in words is "thirty-nine billion, eight hundred forty-seven million, four hundred eighty-nine thousand, nine hundred twenty".