3858647488920 has 320 divisors, whose sum is σ = 14842120043520. Its totient is φ = 880785674496.

The previous prime is 3858647488909. The next prime is 3858647488957. The reversal of 3858647488920 is 298847468583.

3858647488920 is a `hidden beast` number, since 3 + 8 + 5 + 86 + 47 + 488 + 9 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 16736749 + ... + 16965731.

It is an arithmetic number, because the mean of its divisors is an integer number (46381625136).

Almost surely, 2^{3858647488920} is an apocalyptic number.

3858647488920 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 3858647488920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7421060021760).

3858647488920 is an abundant number, since it is smaller than the sum of its proper divisors (10983472554600).

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

3858647488920 is a wasteful number, since it uses less digits than its factorization.

3858647488920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229756 (or 229743 counting only the distinct ones).

The product of its (nonzero) digits is 743178240, while the sum is 72.

The spelling of 3858647488920 in words is "three trillion, eight hundred fifty-eight billion, six hundred forty-seven million, four hundred eighty-eight thousand, nine hundred twenty".