7659640 has 16 divisors (see below), whose sum is σ = 17234280. Its totient is φ = 3063840.

The previous prime is 7659623. The next prime is 7659647. The reversal of 7659640 is 469567.

It is a self number, because there is not a number n which added to its sum of digits gives 7659640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7659647) 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 3 ways as a sum of consecutive naturals, for example, 95706 + ... + 95785.

Almost surely, 2^7659640 is an apocalyptic number.

It is an amenable number.

7659640 is an abundant number, since it is smaller than the sum of its proper divisors (9574640).

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

7659640 is a wasteful number, since it uses less digits than its factorization.

7659640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191502 (or 191498 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 7659640 is about 2767.6054632118. The cubic root of 7659640 is about 197.1224641592.

It can be divided in two parts, 76596 and 40, that added together give a triangular number (76636 = T₃₉₁).

The spelling of 7659640 in words is "seven million, six hundred fifty-nine thousand, six hundred forty".