7644340 has 24 divisors (see below), whose sum is σ = 17512992. Its totient is φ = 2779680.

The previous prime is 7644317. The next prime is 7644347. The reversal of 7644340 is 434467.

It is a junction number, because it is equal to n+sod(n) for n = 7644299 and 7644308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7644347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17154 + ... + 17593.

It is an arithmetic number, because the mean of its divisors is an integer number (729708).

Almost surely, 2^7644340 is an apocalyptic number.

It is an amenable number.

7644340 is an abundant number, since it is smaller than the sum of its proper divisors (9868652).

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

7644340 is a wasteful number, since it uses less digits than its factorization.

7644340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34767 (or 34765 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 7644340 is about 2764.8399592020. The cubic root of 7644340 is about 196.9911270880.

The spelling of 7644340 in words is "seven million, six hundred forty-four thousand, three hundred forty".