8340122640 has 80 divisors (see below), whose sum is σ = 26553175488. Its totient is φ = 2163921408.

The previous prime is 8340122617. The next prime is 8340122641. The reversal of 8340122640 is 462210438.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8340122598 and 8340122607.

It is not an unprimeable number, because it can be changed into a prime (8340122641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 460722 + ... + 478481.

Almost surely, 2^8340122640 is an apocalyptic number.

8340122640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8340122640 is an abundant number, since it is smaller than the sum of its proper divisors (18213052848).

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

8340122640 is a wasteful number, since it uses less digits than its factorization.

8340122640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939256 (or 939250 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 8340122640 is about 91324.2719105934. The cubic root of 8340122640 is about 2027.9511015290.

The spelling of 8340122640 in words is "eight billion, three hundred forty million, one hundred twenty-two thousand, six hundred forty".