7945040 has 40 divisors (see below), whose sum is σ = 19448160. Its totient is φ = 3010176.

The previous prime is 7945039. The next prime is 7945057. The reversal of 7945040 is 405497.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 7944994 and 7945012.

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, 1094 + ... + 4133.

It is an arithmetic number, because the mean of its divisors is an integer number (486204).

Almost surely, 2^7945040 is an apocalyptic number.

It is an amenable number.

7945040 is an abundant number, since it is smaller than the sum of its proper divisors (11503120).

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

7945040 is a wasteful number, since it uses less digits than its factorization.

7945040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5259 (or 5253 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 7945040 is about 2818.6947333828. The cubic root of 7945040 is about 199.5409471586.

The spelling of 7945040 in words is "seven million, nine hundred forty-five thousand, forty".