3926639660 has 24 divisors (see below), whose sum is σ = 8266730640. Its totient is φ = 1566696384.

The previous prime is 3926639641. The next prime is 3926639663. The reversal of 3926639660 is 669366293.

It is a junction number, because it is equal to n+sod(n) for n = 3926639599 and 3926639608.

It is not an unprimeable number, because it can be changed into a prime (3926639663) 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, 239330 + ... + 255209.

It is an arithmetic number, because the mean of its divisors is an integer number (344447110).

Almost surely, 2^3926639660 is an apocalyptic number.

It is an amenable number.

3926639660 is an abundant number, since it is smaller than the sum of its proper divisors (4340090980).

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

3926639660 is a wasteful number, since it uses less digits than its factorization.

3926639660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494945 (or 494943 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 50.

The square root of 3926639660 is about 62662.9049757510. The cubic root of 3926639660 is about 1577.6367570221.

The spelling of 3926639660 in words is "three billion, nine hundred twenty-six million, six hundred thirty-nine thousand, six hundred sixty".