7931940 has 24 divisors (see below), whose sum is σ = 22209600. Its totient is φ = 2115168.

The previous prime is 7931923. The next prime is 7931953. The reversal of 7931940 is 491397.

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, 66040 + ... + 66159.

It is an arithmetic number, because the mean of its divisors is an integer number (925400).

Almost surely, 2^7931940 is an apocalyptic number.

It is an amenable number.

7931940 is an abundant number, since it is smaller than the sum of its proper divisors (14277660).

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

7931940 is a wasteful number, since it uses less digits than its factorization.

7931940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132211 (or 132209 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 7931940 is about 2816.3700041010. The cubic root of 7931940 is about 199.4312172979.

The spelling of 7931940 in words is "seven million, nine hundred thirty-one thousand, nine hundred forty".