7886940 has 24 divisors (see below), whose sum is σ = 22083600. Its totient is φ = 2103168.

The previous prime is 7886939. The next prime is 7886947. The reversal of 7886940 is 496887.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7886892 and 7886901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7886947) 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, 65665 + ... + 65784.

It is an arithmetic number, because the mean of its divisors is an integer number (920150).

Almost surely, 2^7886940 is an apocalyptic number.

It is an amenable number.

7886940 is an abundant number, since it is smaller than the sum of its proper divisors (14196660).

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

7886940 is a wasteful number, since it uses less digits than its factorization.

7886940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131461 (or 131459 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 7886940 is about 2808.3696337911. The cubic root of 7886940 is about 199.0533597639.

The spelling of 7886940 in words is "seven million, eight hundred eighty-six thousand, nine hundred forty".