3921726220 has 24 divisors (see below), whose sum is σ = 8248112208. Its totient is φ = 1566312000.

The previous prime is 3921726191. The next prime is 3921726227. The reversal of 3921726220 is 226271293.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3921726227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135106 + ... + 161545.

It is an arithmetic number, because the mean of its divisors is an integer number (343671342).

Almost surely, 2^3921726220 is an apocalyptic number.

It is an amenable number.

3921726220 is an abundant number, since it is smaller than the sum of its proper divisors (4326385988).

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

3921726220 is a wasteful number, since it uses less digits than its factorization.

3921726220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297321 (or 297319 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 3921726220 is about 62623.6873714731. The cubic root of 3921726220 is about 1576.9784452769.

The spelling of 3921726220 in words is "three billion, nine hundred twenty-one million, seven hundred twenty-six thousand, two hundred twenty".