7942940 has 24 divisors (see below), whose sum is σ = 16746912. Its totient is φ = 3164480.

The previous prime is 7942919. The next prime is 7942967. The reversal of 7942940 is 492497.

It is a self number, because there is not a number n which added to its sum of digits gives 7942940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5582 + ... + 6858.

It is an arithmetic number, because the mean of its divisors is an integer number (697788).

Almost surely, 2^7942940 is an apocalyptic number.

It is an amenable number.

7942940 is an abundant number, since it is smaller than the sum of its proper divisors (8803972).

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

7942940 is a wasteful number, since it uses less digits than its factorization.

7942940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597 (or 1595 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 7942940 is about 2818.3221959173. The cubic root of 7942940 is about 199.5233649977.

The spelling of 7942940 in words is "seven million, nine hundred forty-two thousand, nine hundred forty".