8240399660 has 24 divisors (see below), whose sum is σ = 17365999056. Its totient is φ = 3284510400.

The previous prime is 8240399653. The next prime is 8240399777. The reversal of 8240399660 is 669930428.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 722291 + ... + 733610.

It is an arithmetic number, because the mean of its divisors is an integer number (723583294).

Almost surely, 2^8240399660 is an apocalyptic number.

It is an amenable number.

8240399660 is an abundant number, since it is smaller than the sum of its proper divisors (9125599396).

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

8240399660 is a wasteful number, since it uses less digits than its factorization.

8240399660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456193 (or 1456191 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 47.

The square root of 8240399660 is about 90776.6471070616. The cubic root of 8240399660 is about 2019.8359226923.

The spelling of 8240399660 in words is "eight billion, two hundred forty million, three hundred ninety-nine thousand, six hundred sixty".