7689940 has 12 divisors (see below), whose sum is σ = 16148916. Its totient is φ = 3075968.

The previous prime is 7689937. The next prime is 7689943. The reversal of 7689940 is 499867.

It is an interprime number because it is at equal distance from previous prime (7689937) and next prime (7689943).

It can be written as a sum of positive squares in 2 ways, for example, as 5391684 + 2298256 = 2322^2 + 1516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7689943) 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 3 ways as a sum of consecutive naturals, for example, 192229 + ... + 192268.

It is an arithmetic number, because the mean of its divisors is an integer number (1345743).

Almost surely, 2^7689940 is an apocalyptic number.

It is an amenable number.

7689940 is an abundant number, since it is smaller than the sum of its proper divisors (8458976).

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

7689940 is a wasteful number, since it uses less digits than its factorization.

7689940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384506 (or 384504 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 7689940 is about 2773.0741064746. The cubic root of 7689940 is about 197.3820478202.

The spelling of 7689940 in words is "seven million, six hundred eighty-nine thousand, nine hundred forty".