7969640 has 32 divisors (see below), whose sum is σ = 20494080. Its totient is φ = 2732352.

The previous prime is 7969639. The next prime is 7969657. The reversal of 7969640 is 469697.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13952 + ... + 14511.

It is an arithmetic number, because the mean of its divisors is an integer number (640440).

Almost surely, 2^7969640 is an apocalyptic number.

7969640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7969640 is an abundant number, since it is smaller than the sum of its proper divisors (12524440).

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

7969640 is a wasteful number, since it uses less digits than its factorization.

7969640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28481 (or 28477 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 7969640 is about 2823.0550827074. The cubic root of 7969640 is about 199.7466792785.

The spelling of 7969640 in words is "seven million, nine hundred sixty-nine thousand, six hundred forty".