3856217235780 has 192 divisors, whose sum is σ = 13717799682048. Its totient is φ = 787373637120.

The previous prime is 3856217235751. The next prime is 3856217235791. The reversal of 3856217235780 is 875327126583.

It is a super-2 number, since 2×3856217235780² (a number of 26 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3856217235780.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11222142 + ... + 11560661.

It is an arithmetic number, because the mean of its divisors is an integer number (71446873344).

Almost surely, 2^{3856217235780} is an apocalyptic number.

3856217235780 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3856217235780 is an abundant number, since it is smaller than the sum of its proper divisors (9861582446268).

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

3856217235780 is a wasteful number, since it uses less digits than its factorization.

3856217235780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22782866 (or 22782864 counting only the distinct ones).

The product of its (nonzero) digits is 16934400, while the sum is 57.

The spelling of 3856217235780 in words is "three trillion, eight hundred fifty-six billion, two hundred seventeen million, two hundred thirty-five thousand, seven hundred eighty".